| 1. |
- Asplund, Lillemor, et al.
(författare)
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Screening av Tetrabrombisfenol A
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Tetrabrombisfenol A (TBBPA), CAS nr 79-94-7, är ett flamskyddsmedel med stor användning. Till största delen används det som reaktivt flamskyddsmedel, dvs. TBBPA binds in kemiskt i polymera material. Allt binds dock inte in utan en mindre del kan läcka ut från den flamskyddade produkten (Sellström och Jansson, 1995). En viss användning av TBBPA som additivt flamskyddsmedel förekommer också (KemI, 2000). TBBPA är det flamskyddsmedel som omsätts mest i Sverige, 2001 omsattes 203 ton vilket kan jämföras med 58 ton för hexabromcyklododekan (HBCD). Användningen av HBCD ökade medan användningen av TBBPA minskade enligt KEMI (KemI, 2003, 4/03 ). TBBPA används främst vid tillverkning av flamskyddad epoxy- och polykarbonatplast men även i omättad polyester (WHO/IPCS, 1995). Epoxyplast som flamskyddats med TBBPA används huvudsakligen i kretskort. TBBPA används också i plastinkapslingar av elektroniska komponenter, i kåpor och i höljen till elektrisk utrustning.
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| 2. |
- Lindstrand, Anna, et al.
(författare)
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Genome sequencing is a sensitive first-line test to diagnose individuals with intellectual disability
- 2022
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Ingår i: Genetics in Medicine. - : ELSEVIER SCIENCE INC. - 1098-3600 .- 1530-0366. ; 24:11, s. 2296-2307
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: Individuals with intellectual disability (ID) and/or neurodevelopment disorders (NDDs) are currently investigated with several different approaches in clinical genetic diagnostics. Methods: We compared the results from 3 diagnostic pipelines in patients with ID/NDD: genome sequencing (GS) first (N = 100), GS as a secondary test (N = 129), or chromosomal microarray (CMA) with or without FMR1 analysis (N = 421). Results: The diagnostic yield was 35% (GS -first), 26% (GS as a secondary test), and 11% (CMA/FMR1). Notably, the age of diagnosis was delayed by 1 year when GS was performed as a secondary test and the cost per diagnosed individual was 36% lower with GS first than with CMA/FMR1. Furthermore, 91% of those with a negative result after CMA/FMR1 analysis (338 individuals) have not yet been referred for additional genetic testing and remain undiagnosed. Conclusion: Our findings strongly suggest that genome analysis outperforms other testing strategies and should replace traditional CMA and FMR1 analysis as a first-line genetic test in individuals with ID/NDD. GS is a sensitive, time-and cost-effective method that results in a confirmed molecular diagnosis in 35% of all referred patients. (c) 2022 The Authors. Published by Elsevier Inc. on behalf of American College of Medical Genetics and Genomics. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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| 3. |
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| 4. |
- Abbey-Lee, Robin N., et al.
(författare)
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The Influence of Rearing on Behavior, Brain Monoamines, and Gene Expression in Three-Spined Sticklebacks
- 2018
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Ingår i: Brain, behavior, and evolution. - Basel : S. Karger AG. - 0006-8977 .- 1421-9743. ; 91:4, s. 201-213
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Tidskriftsartikel (refereegranskat)abstract
- The causes of individual variation in behavior are often not well understood, and potential underlying mechanisms include both intrinsic and extrinsic factors, such as early environmental, physiological, and genetic differences. In an exploratory laboratory study, we raised three-spined sticklebacks (Gasterosteus aculeatus) under 4 different environmental conditions (simulated predator environment, complex environment, variable social environment, and control). We investigated how these manipulations related to behavior, brain physiology, and gene expression later in life, with focus on brain dopamine and serotonin levels, turnover rates, and gene expression. The different rearing environments influenced behavior and gene expression, but did not alter monoamine levels or metabolites. Specifically, compared to control fish, fish exposed to a simulated predator environment tended to be less aggressive, more exploratory, and more neophobic; and fish raised in both complex and variable social environments tended to be less neophobic. Exposure to a simulated predator environment tended to lower expression of dopamine receptor DRD4A, a complex environment increased expression of dopamine receptor DRD1B, while a variable social environment tended to increase serotonin receptor 5-HTR2B and serotonin transporter SLC6A4A expression. Despite both behavior and gene expression varying with early environment, there was no evidence that gene expression mediated the relationship between early environment and behavior. Our results confirm that environmental conditions early in life can affect phenotypic variation. However, the mechanistic pathway of the monoaminergic systems translating early environmental variation into observed behavioral responses was not detected.
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| 5. |
- af Klinteberg, Maja, 1980-, et al.
(författare)
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Decreasing prevalence of atopic dermatitis in Swedish schoolchildren : three repeated population-based surveys
- 2024
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Ingår i: British Journal of Dermatology. - : Oxford University Press. - 0007-0963 .- 1365-2133. ; 190:2, s. 191-198
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Tidskriftsartikel (refereegranskat)abstract
- Background: The prevalence of atopic dermatitis (AD) has increased over several decades and now affects about one-fifth of all children in high-income countries (HICs). While the increase continues in lower-income countries, the prevalence of AD might have reached a plateau in HICs.Objectives: To investigate trends in the prevalence of AD and atopic comorbidity in schoolchildren in Sweden.Methods: The study population consisted of three cohorts of children (median age 8 years) in Norrbotten, Sweden, for 1996 (n = 3430), 2006 (n = 2585) and 2017 (n = 2785). An identical questionnaire that included questions from the International Study of Asthma and Allergies in Childhood (ISAAC) protocol was used in all three cohorts. Trends in AD prevalence were estimated, as well as trends in atopic comorbidity. AD prevalence was estimated both according to the ISAAC definition of AD and by adding the reported diagnosis by a physician (D-AD).Results: The prevalence of AD decreased in the last decade, from 22.8% (1996) and 21.3% (2006) to 16.3% (2017; P < 0.001). The prevalence of D-AD was lower, but the same pattern of decrease was seen, from 9.3% (1996) and 9.4% (2006) to 5.7% (2017; P < 0.001). In all three cohorts, AD was more common among girls than boys (18.9% vs. 13.8% in 2017; P < 0.001). Children from the mountain inlands had a higher prevalence of AD than children from coastal cities (22.0% vs. 15.1% in 2017; P < 0.001). In comparing D-AD, there were no significant differences between the sexes or between inland or coastal living. Concomitant asthma increased over the years from 12.2% (1996) to 15.8% (2006) to 23.0% (2017; P < 0.001). Concomitant allergic rhinitis and allergic sensitization increased from 1996 (15.0% and 27.5%) to 2006 (24.7% and 49.5%) but then levelled off until 2017 (21.0% and 46.7%).Conclusions: The prevalence of AD among schoolchildren in Sweden decreased over the study period, whereas atopic comorbidity among children with AD increased. Although a decrease was seen, AD is still common and the increase in atopic comorbidity among children with AD, especially the increase in asthma, is concerning.
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| 6. |
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| 7. |
- Berthold, Malin, et al.
(författare)
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Association of Sensitization to Specific Pet Allergen Components with Asthma Symptoms in School Children
- 2015
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Ingår i: Journal of Allergy and Clinical Immunology. - : Elsevier. - 0091-6749 .- 1097-6825. ; 135:2, s. AB22-AB22
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Animal sensitization is a known determinant of asthma in children. The objective was to study the association of asthma with sensitization to pet allergen components in schoolchildren. Methods: A random sample of 696 children (11-12 y) from a Swedish population-based cohort was analyzed for sensitization (≥0.1 kUA/L) to cat, dog and horse dander extracts using ImmunoCAP. Sensitized children were further analyzed for IgE antibodies to animal allergen components using ImmunoCAP ISAC112. An expanded ISAAC questionnaire was completed by the parents. Results: Of 259 animal-sensitized children (37%) the majority (75%) were sensitized to more than one species. Among the 11 % (n=77) with current asthma 69 % were sensitized to at least one animal extract, as compared to one third of children without current asthma (p<0.001). Current asthma and asthma symptoms upon contact with cats were associated with co-sensitization to Fel d 1 and Fel d 4. Already at moderate levels of IgE antibodies to Fel d 4 (1-15 ISU), at which level most children were sensitized also to Fel d 1, the prevalence of asthma symptoms upon contact with cats was significantly increased. Dog-sensitized children were commonly sensitized to several dog components, and the greatest risk for asthma was seen in children co-sensitized to Can f 5 and Can f 1/f 2. Conclusions: Among Northern Swedish schoolchildren furry animals were the main perennial sensitizers. Asthma symptoms were associated with sensitizations to multiple components within an animal species. In particular, cat Fel d 4 sensitization was strongly related to asthma symptoms.
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| 8. |
- Bjerg, Anders, 1982, et al.
(författare)
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A population-based study of animal component sensitization, asthma, and rhinitis in schoolchildren
- 2015
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Ingår i: Pediatric Allergy and Immunology. - : Wiley. - 0905-6157 .- 1399-3038. ; 26:6, s. 557-563
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Tidskriftsartikel (refereegranskat)abstract
- BackgroundAnimal sensitization is a major determinant of asthma in children. Component-resolved studies of unselected pediatric populations are lacking. The aim was to describe sensitization to animal components and the association with asthma and rhinitis in animal-sensitized schoolchildren. MethodsA random sample of 696 children (11-12years) from a Swedish population-based cohort was tested for sensitization to cat, dog, and horse dander using ImmunoCAP. Sera from animal-sensitized children were further analyzed by microarray including three allergen components from cat, four from dog, and two from horse. The parents completed an expanded ISAAC questionnaire. ResultsOf 259 animal-sensitized children (0.1 kU(A)/l), 51% were sensitized to all three, 23% to two, and 25% to one species. Current asthma and asthma symptoms following contact with cats were associated with co-sensitization to Fel d 1 and Fel d 4. This association was seen already at moderate-level sensitization (1-15 ISU) to Fel d 4, at which level most children were sensitized to Fel d 1, as well. In dog-sensitized children, the majority was sensitized to more than one dog component, and co-sensitization to Can f 5 and Can f 1/f 2 conferred the greatest risk for asthma. Sensitization to the highly cross-reactive serum albumins was uncommon and not associated with asthma. ConclusionsAmong schoolchildren in northern Sweden, where mite allergy is uncommon, furry animals were the primary perennial sensitizers. Asthma was associated with higher levels of component sensitization, and sensitization to more than one component from the same animal conferred the greatest risk.
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| 9. |
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| 10. |
- Bunne, Joakim, et al.
(författare)
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The Majority of Children Sensitized Before School-Age Develop Allergic Disease Before Adulthood: A Longitudinal Population-Based Study
- 2022
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Ingår i: Journal of Allergy and Clinical Immunology: In Practice. - : Elsevier BV. - 2213-2198 .- 2213-2201. ; 10:2
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Tidskriftsartikel (refereegranskat)abstract
- Background: Allergic sensitization increases the risk of asthma and allergic rhinitis, but the impact of age at onset of sensitization is less studied. Objective: To examine the cumulative incidence of asthma and rhinitis up to age 19 years in relation to age at onset of sensitization to airborne allergens. Method: All children in grade 1 and 2 (median age, 8 years) in 2 municipalities in Northern Sweden were invited to undergo skin prick tests and answer a questionnaire about allergic diseases, and 88% participated. At ages 12 and 19 years, the protocol was repeated, and 1510 individuals participated in all 3 examinations. Specific IgE data were collected in a random sample at age 19 years (n = 770). Onset of sensitization was defined: 8 years or less, 8 to 12 years, 12 to 19 years, and never sensitized. Adjusted Poisson regression was used to calculate risk ratios (RRs). Results: At 19 years, those sensitized at 8 years of age or earlier had the highest risk of asthma (RR, 4.68; 95% CI, 3.15-6.97) and rhinitis (RR, 22.3; 95% CI, 13.3-37.6), and 84% had developed either asthma or rhinitis. The combination of sensitization at age 8 years or earlier and family history of allergic diseases rendered high risks for asthma (RR, 10.6; 95% CI, 6.71-16.7) and rhinitis (RR, 36.3; 95% CI, 18.9-69.7). Individuals sensitized at age 8 years or earlier showed significantly highest level of sensitization, as judged by number of positive skin test results and titers of specific IgE. Conclusions: Most individuals with sensitization at age 8 years or earlier developed asthma or rhinitis before young adulthood. The high level of sensitization in those sensitized early contributes to the high incidence of allergic airway conditions. © 2021 The Authors
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| 11. |
- Fjæstad, Björn, 1943-, et al.
(författare)
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National profile: Sweden
- 1998
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Ingår i: Biotechnology in the public sphere. - London : Science Museum. - 190074709X ; , s. 130-143
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 12. |
- Fjæstad, Björn, 1943-, et al.
(författare)
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Sweden, the lid is on, but for how long?
- 2001
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Ingår i: Biotechnology 1996-2000. - London : Science Museum. - 190074743X ; , s. 267-281
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 13. |
- Hedman, Linnea, 1979-, et al.
(författare)
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Diagnostic intervention improved health-related quality of life among teenagers with food allergy
- 2024
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Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 19:1 January
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: The aim was to examine if a diagnostic intervention set up to assess current food allergy to cow’s milk, hen’s egg, fish, or wheat among teenagers had an impact on generic and disease specific health-related quality of life (HRQL). The study compared HRQL scoring before and two years after the intervention, and in relation to age matched controls without reported food allergy.Methods: The study was performed within the Obstructive Lung Disease in Northern Sweden (OLIN) studies where a cohort study on asthma and allergic diseases among 8-year-old schoolchildren was initiated in 2006. At age 12 years, the 125/2612 (5%) children who reported allergy to cow’s milk, hen’s egg, fish, or wheat were invited to a diagnostic intervention including clinical examination, blood tests and evaluation by a pediatric allergist. Of 94 participants, 79 completed generic and disease specific HRQL questionnaires. Additionally, a random sample of 200 (62% of invited) children without food allergy from the OLIN cohort answered the generic HRQL questionnaire. The respondents of the HRQL questionnaires were reexamined two years later and 57 teenagers with and 154 without reported allergy participated.Results: There were no significant differences in generic HRQL scores between teenagers with and without reported food allergy at study entry, or after the intervention. Among those with reported food allergy, we found a significant improvement in disease specific HRQL after the intervention (mean values: 3.41 vs 2.80, p<0.001). Teenagers with only food allergy had better disease specific HRQL compared to those with one, two or three concomitant allergic diseases, both before and after the intervention. Children with only food allergy significantly improved their HRQL after the intervention, 1.84 vs. 2.87 (p<0.001) but this association was not seen in children with one other allergic disorder (3.16 vs. 3.65, p = 0.121) or those with two or more allergic disorders (3.72 vs. 3.90, p = 0.148).Conclusion: The diagnostic intervention showed a long-term improvement of disease specific HRQL but not generic HRQL.
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| 14. |
- Hedman, Linnea, 1979-, et al.
(författare)
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Is asthma in children still increasing? : 20-year prevalence trends in northern Sweden
- 2024
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Ingår i: Pediatric Allergy and Immunology. - : John Wiley & Sons. - 0905-6157 .- 1399-3038. ; 35:4
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Tidskriftsartikel (refereegranskat)abstract
- Background: In the present study, we describe prevalence trends of asthma and investigate the association with asthma symptoms, use of asthma medication, and asthma severity among 8-year-old children in Norrbotten, Sweden in 1996, 2006, and 2017.Methods: Within the Obstructive Lung Disease in Northern Sweden (OLIN) studies, three pediatric cohorts were recruited in 1996, 2006, and 2017 respectively. Identical methods were used; all children in first and second grade (median age 8 years) in three municipalities were invited to a parental questionnaire survey, completed by n = 3430 in 1996 (97% participation), n = 2585 in 2006 (96%), and n = 2785 in 2017 (91%). The questionnaire included questions about respiratory symptoms and diagnosis, treatment, and severity of asthma.Results: The prevalence of wheezing was stable during the study, 10.1% in 1996; 10.8% in 2006; and 10.3% in 2017, p =.621, while physician-diagnosed asthma increased: 5.7%, 7.4%, and 12.2%, p <.001. The use of asthma medication in the last 12 months increased: 7.1%, 8.7%, and 11.5%, p <.001. Among children diagnosed with asthma, the prevalence of asthma symptoms, the impact on daily life, and severe asthma decreased, while the use of inhaled corticosteroids increased from 1996 until 2017.Conclusion: The prevalence of wheezing was stable among 8-year-old in this area from 1996 to 2017, while the prevalence of physician-diagnosed asthma doubled but without an increase in asthma morbidity. The increase of physician-diagnosed asthma without a coincident increase in asthma morbidity can partly be explained by more and earlier diagnosis among those with mild asthma.
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| 15. |
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| 16. |
- Krång, Anna-Sara, et al.
(författare)
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Sammanställning av kunskap och åtgärdsförslag för att minska spridning av mikroplast från konstgräsplaner och andra utomhusanläggningar för idrott och lek
- 2019
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- IVL har genom mätningar vid lekplatser och idrottsanläggningar med gjutet gummi påvisat höga halter mikroplast i närbelägna dagvattenbrunnar. Vidare spridning i vattenmiljön har dock ej undersökts. Därtill har nuvarande situation och kunskapsläge i Sverige sammanställts för anläggningar med gjutet gummi, konstgräsplaner och ridanläggningar. Syftet med studien är att öka kunskapen om de olika anläggningstyperna som källa till mikroplast och att ta fram åtgärdsförslag för att minska spridningen av mikroplast till miljön. Projekt har utförts på uppdrag av Naturvårdsverket.
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| 17. |
- Lundgren, Anna, 1968-
(författare)
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The Openness Buzz : A Study of Openness in Planning, Politics and Political Decision-Making in Sweden from an Institutional Perspective
- 2017
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In today’s society of increased globalization and digitalization openness has become a buzzword. This raises questions about what we mean by openness and how it is interpreted in various contexts. This thesis has two aims; to explore how openness is interpreted in planning, politics and political decision-making, and to develop an analytical tool to assess openness in different contexts. A new institutional theory framework that centers on the interplay between institutions and actors has been used, and three empirical case studies in a Swedish context were conducted to analyze how openness is interpreted in planning in metropolitan regions, in politics through the political parties and in political decision-making in the Stockholm region. The research concludes that openness in planning, politics and political decision-making is interpreted along two inter-linked narrative lines: ’openness to people’ and ’openness to knowledge, information and ideas’. It was more common to talk about peoples’ accessibility to public services and participation in different parts of society (’openness to people’) than to talk about issues of transparency and ’openness to knowledge, information and ideas’. The institutional framework shows how openness is interpreted at different institutional levels. To what degree openness is expressed at different institutional levels vary by context. In planning for instance, openness is mainly interpreted in terms of governance, whereas in politics and political decision-making, openness is interpreted in an inter-play between culture and norms, institutions, governance and practice. The institutional framework complementary context-specific theories and elaborated into an analytical model, was found useful to explain what mechanisms are at play when dealing with openness in planning, politics and political decision-making, and can be applicable in future research of openness in other geographical or organizational contexts.
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| 18. |
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| 19. |
- Persson, Karin, et al.
(författare)
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Vitamin D deficiency at the Arctic Circle a study in food-allergic adolescents and controls
- 2013
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Ingår i: Acta Paediatrica. - Hoboken, NJ, USA : Wiley-Blackwell. - 0803-5253 .- 1651-2227. ; 102:6, s. 644-649
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Tidskriftsartikel (refereegranskat)abstract
- Aim At the extremes of latitude, UVB intensity is insufficient for adequate vitamin D synthesis in winter. Fatty fish, vitamin D enriched milk, margarine and eggs are main dietary sources of vitamin D. Their elimination may increase the risk of vitamin D deficiency. The aim was to assess vitamin D status in food-allergic adolescents eliminating milk, egg and/or fish compared with adolescents on normal diets. Methods In winter, vitamin D intake was assessed by a food frequency questionnaire in 20 food-allergic adolescents and 42 controls in the population-based Obstructive Lung Disease In Northern Sweden (OLIN) cohort studies. Vitamin D supplementation was queried. Serum 25-hydroxyvitamin D [S-25(OH)D] and S-parathormone (S-PTH) levels were determined. Results Mean (SD) dietary vitamin D intake was 7.9 (3.6) g/day in allergic adolescents and 7.8 (3.4) in controls (p>0.05). Mean (SD) S-25(OH)D levels in supplement consumers were 44 (18) nmol/L compared with 35 (10) in non-consumers (p=0.03). S-25(OH)D and S-PTH levels were similar in food-allergic adolescents and controls (p>0.05). Eighty-two percentage had deficient S-25(OH)D levels <50nmol/L, and none reached levels >75nmol/L. Conclusion Vitamin D deficiency was as common in food-allergic adolescents as in controls although the vitamin D intake met national recommendations. Large-scale studies on the prevalence of vitamin D deficiency in this region are needed.
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| 20. |
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| 21. |
- Rönmark, Eva, et al.
(författare)
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Prevalence and risk factors for allergic sensitization : 3 cross-sectional studies among schoolchildren from 1996 to 2017
- 2023
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Ingår i: Journal of Allergy and Clinical Immunology: Global. - : Elsevier. - 2772-8293. ; 2:4
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Tidskriftsartikel (refereegranskat)abstract
- Background: The prevalence of allergic sensitization and allergic diseases has increased for decades in Northern Europe, but recent studies are lacking.Objective: We sought to study the prevalence trends of allergic sensitization, associated risk factors, and the association with asthma and allergic rhinitis (AR) among children in Northern Sweden.Methods: Three cohorts of children aged 7 to 8 years participated in a skin prick test (SPT) with 10 airborne allergens in 1996, 2006, and 2017, with 2148, 1693, and 1762 participants tested, respectively, representing 87% to 90% of schoolchildren in the catchment communities. Adjusted Poisson regression was used to identify risk factors for allergic sensitization and the association with asthma and AR.Results: The prevalence of any positive SPT response increased from 21% in 1996 to 30% in 2006 and remained at 30% in 2017 (P <.001). Sensitization to cat was the most common for all the years. The risk factor pattern for a positive SPT response was similar in all examinations, with positive and significant associations with a family history of allergy (risk ratio, 1.4-1.5) and negative and significant associations with having a cat at home (risk ratio, 0.7-0.8). The prevalence of physician-diagnosed asthma increased, but the association with allergic sensitization weakened. The opposite trends were found for AR—decreasing prevalence and strengthened association with allergic sensitization.Conclusions: The prevalence of allergic sensitization increased from 1996 to 2006 but plateaued in the next decade, whereas the risk factor pattern remained stable. The diverging trends of associations between allergic sensitization and asthma and AR suggest secular trends in the clinical management of allergic diseases.
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| 22. |
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| 23. |
- Strinnholm, Åsa, et al.
(författare)
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Food hypersensitivity is common in Swedish schoolchildren, especially oral reactions to fruit and gastrointestinal reactions to milk
- 2014
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Ingår i: Acta Paediatrica. - : Wiley. - 0803-5253 .- 1651-2227. ; 103:12, s. 1290-1296
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Tidskriftsartikel (refereegranskat)abstract
- AIM: This study examined the prevalence, symptom expression and risk factors for food hypersensitivity among Swedish schoolchildren.METHODS: Parents of 2585 (96% of invited) children aged 7-8 years completed a questionnaire regarding food hypersensitivity and allergic diseases. A random sample of 1700 children (90% of invited) also participated in skin prick testing with ten airborne allergens.RESULTS: The overall prevalence of reported food hypersensitivity to milk, egg, fish, wheat, soya, fruits and, or, nuts was 21%, with symptoms caused by milk (9%) being the most common. The most frequently reported symptoms were oral symptoms (47.4%), mainly caused by fruit, and gastrointestinal symptoms (45.7%), mainly caused by milk. Factors associated with any food hypersensitivity were female sex, allergic heredity and a positive skin prick test. Eczema was consistently associated with symptoms caused by milk, egg, fish, wheat, soya, fruits and nuts. Rhinitis was associated to the same foods, except milk.CONCLUSION: Reported food hypersensitivity was common among Swedish schoolchildren. The most frequent symptom expressions were oral symptoms triggered by fruits and gastrointestinal symptoms triggered by milk. The high prevalence of reported symptoms should be validated by clinical examinations to provide a diagnosis.
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| 24. |
- Strinnholm, Åsa, et al.
(författare)
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Health Related Quality of Life among schoolchildren aged 12-13 years in relation to food hypersensitivity phenotypes : a population-based study
- 2017
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Ingår i: Clinical and Translational Allergy. - : BioMed Central. - 2045-7022. ; 7
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Tidskriftsartikel (refereegranskat)abstract
- Background:While Health Related Quality of Life has been investigated among children with IgE-mediated food allergy, less is known about quality of life among children with other types of hypersensitivity to food. The aim of this study was to investigate Health Related Quality of Life (HRQL) in children with and without food hypersensitivity. Further, we compared HRQL between children with different phenotypes of food hypersensitivity. Methods:In a large population-based cohort of schoolchildren in Northern Sweden, the parents of 2,612 (96% of invited) completed a questionnaire. All 125 (5%) children who reported complete elimination of milk, egg, fish or wheat due to food hypersensitivity were invited to a clinical examination and 94 children participated. Of these, 75 children also completed a generic (KIDSCREEN -52) and a disease-specific HRQL questionnaire (FAQLQ-TF). Thereafter, these children were categorised into the different phenotypes: current food allergy, outgrown food allergy, and lactose intolerance. Additionally, 209 children with unrestricted diets answered the generic questionnaire.Results:The median score of all KIDSCREEN -52 domains were above the population norm of 50 both in children with and without food hypersensitivity. No significant differences in distribution in generic or disease-specific HRQL were found between children with or without food hypersensitivity. There were no significant differences in HRQL between children with different phenotypes of food hypersensitivity. However, children with current food allergy tended to have the lowest HRQL. Further, poor HRQL defined as ≥75th percentile for the disease specific score was significantly more common in the current food allergy phenotype in the domain Emotional impact and the total FAQLQ, compared to the other phenotypes.Conclusions: In this population-based study, 12-13 year old children reported good HRQL regardless of having food hypersensitivity or not. However, the children with the current phenotype reported lower HRQL than the other phenotypes.
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| 25. |
- Strinnholm, Åsa, et al.
(författare)
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Reintroduction failure is common among adolescents after double-blind placebo-controlled food challenges
- 2017
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Ingår i: Acta Paediatrica. - : Wiley. - 0803-5253 .- 1651-2227. ; 106:2, s. 282-287
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Tidskriftsartikel (refereegranskat)abstract
- AIM: There has been a lack of research on adolescents' who undergo double-blind placebo-controlled food challenges. The aim of this study was to investigate food allergic adolescents' experiences and consequences of double-blind placebo-controlled food challenges.METHODS: This qualitative, descriptive interview study included 17 adolescents aged 14-15 years with total elimination of cows' milk, hens' eggs or cod due to food allergies. The participants, who were initially identified from a large population-based cohort study, were interviewed 18 months after completing their challenges.RESULTS: The double-blind placebo-controlled food challenge proved to be a complex experience for the adolescents, involving fear of potential reactions and the hope that the food could be reintroduced. Experiences during the challenge were described in three themes: facing fears in a secure environment, being hesitant but curious about unknown tastes and waiting for unknown food reactions. Experiences after the challenge were desribed in two themes: gaining control and freedom and continuing old habits. A negative challenge was not consistently associated with the reintroduction of the challenged food.CONCLUSION: This study highlighted the importance of considering the adolescents' expectations and experiences of the challenge and the reintroduction process to ensure desirable changes in their dietary habits. Follow ups should be performed regardless of the outcome of challenges.
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| 26. |
- Strinnholm, Åsa, et al.
(författare)
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To face fear : a qualitative study of adolescents' experiences of double-blind, placebo-controlled food challenges
- 2015
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Ingår i: Allergy. European Journal of Allergy and Clinical Immunology. - : Wiley. - 0105-4538 .- 1398-9995. ; 70, s. 386-386
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Background: Double-blind, placebo-controlled food challenges are the gold standard for diagnosing the clinical relevance of a suspected food allergy. Hitherto there are no descriptions on how adolescents' experience this procedure. The aim of this study was to describe adolescents' experiences of double-blind, placebo-controlled food challenges and to what extent the provoked food was reintroduced following the challenge. Method: Seventeen adolescents were interviewed after participating in double-blind, placebo-controlled food challenges. The interview data was analyzed using qualitative content analysis.Results: Experiences during the challenge were: challenging fears in a secure environment, being curious but also hesitant to unknown tastes and waiting for unknown food reactions. Experiences after the challenge were: gaining control and freedom or to stay in old habits. Out of 20 challenges the outcome was negative in 11 cases and positive in 9. Five adolescents with a negative outcome and 4 with mild reactions reintroduced the provoked food. Conclusions: During the challenge the adolescents received knowledge about whether and how they reacted to the provoked food. Reintroduction of the food was not always consistent with the challenge outcome. Independent of the outcome of the challenge and the choices made based on the challenge result, all the adolescents strived for what they felt was a normal life. This study provides a better understanding of young people's experience of double-blind, placebo-controlled food challenge and their motivations to introduce -or not- the previously eliminated food. The result indicate that follow ups are important since the adolescents need support in their striving to manage new food-related situations after the challenge, independent of the outcome.
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| 27. |
- Thunqvist, Per, et al.
(författare)
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Lung function after extremely preterm birth-A population-based cohort study (EXPRESS)
- 2018
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Ingår i: Pediatric Pulmonology. - : Wiley. - 8755-6863 .- 1099-0496. ; 53:1, s. 64-72
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND AND OBJECTIVES: Follow-up studies of children and young adults born very-to-moderately preterm show persistent and significant lung function deficits. The aim of the study was to determine lung function and airway mechanics in school-aged children born in 2004 to 2007 and extremely preterm (after 22-26 weeks of gestation).METHODS: In a population-based cohort of children born extremely preterm and controls born at term (n = 350), follow-up at 6½-years-of-age was performed using spirometry and impulse oscillometry. Associations to gestational age, smallness for gestational age (SGA), and bronchopulmonary dysplasia (BPD) were assessed.RESULTS: Children born extremely preterm had lower forced vital capacity (FVC, z-score: -0.7, 95%CI: -1.0;-0.4), forced expiratory volume (FEV1 , z-score: -1.1, 95%CI: -1.4; -0.8), higher frequency-dependence of resistance (R5-20 , 0.09, 95%CI: 0.05; 0.12 kPa · L-1 · s-1 ) and larger area under the reactance curve (AX, 0.78, 95%CI: 0.49; 1.07 kPa · L-1 ) than controls. In children born at 22-24 weeks of gestation, 24% had FVC and 44% had FEV1 below the lower limit of normal. SGA and severe BPD only marginally contributed to pulmonary outcomes. Asthma-like disease was reported in 40% of extremely preterm children and 15% of controls.CONCLUSION: Many children born extremely preterm have altered airway mechanics and significant obstructive reduction in lung function. This warrants consideration for treatment and continued follow-up.
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| 28. |
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| 29. |
- Winberg, Anna, et al.
(författare)
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Assessment of Allergy to Milk, Egg, Cod, and Wheat in Swedish Schoolchildren : A Population Based Cohort Study
- 2015
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Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 10:7
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Tidskriftsartikel (refereegranskat)abstract
- Objectives Knowledge about the prevalence of allergies to foods in childhood and adolescence is incomplete. The purpose of this study was to investigate the prevalence of allergies to milk, egg, cod, and wheat using reported data, clinical examinations, and double-blind placebo-controlled food challenges, and to describe the phenotypes of reported food hypersensitivity in a cohort of Swedish schoolchildren. Methods In a population-based cohort of 12-year-old children, the parents of 2612 (96% of invited) completed a questionnaire. Specific IgE antibodies to foods were analyzed in a random sample (n=695). Children reporting complete avoidance of milk, egg, cod, or wheat due to perceived hypersensitivity and without physician-diagnosed celiac disease were invited to undergo clinical examination that included specific IgE testing, a celiac screening test, and categorization into phenotypes of food hypersensitivity according to preset criteria. Children with possible food allergy were further evaluated with double-blind challenges. Results In this cohort, the prevalence of reported food allergy to milk, egg, cod, or wheat was 4.8%. Food allergy was diagnosed in 1.4% of the children after clinical evaluation and in 0.6% following double-blind placebo-controlled food challenge. After clinical examination, children who completely avoided one or more essential foods due to perceived food hypersensitivity were categorized with the following phenotypes: allergy (29%), outgrown allergy (19%), lactose intolerance (40%), and unclear (12%). Conclusions There was a high discrepancy in the prevalence of allergy to milk, egg, cod and wheat as assessed by reported data, clinical evaluation, and double-blind food challenges. Food hypersensitivity phenotyping according to preset criteria was helpful for identifying children with food allergy.
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| 30. |
- Winberg, Anna, 1966-, et al.
(författare)
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Dynamics of cytokine mRNA expression and fecal biomarkers in school-children undergoing a double-blind placebo-controlled food challenge series
- 2016
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Ingår i: Cytokine. - : Elsevier BV. - 1043-4666 .- 1096-0023. ; 88, s. 259-266
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Tidskriftsartikel (refereegranskat)abstract
- Background: There is need for prognostic markers for symptomatic food allergy since current diagnostic methods are insufficient and/or time and labor consuming. Objective: To estimate the cytokine mRNA profiles in peripheral blood mononuclear cells (PBMC) before and after a double-blind placebo-controlled food challenge series in schoolchildren with suspected allergy to milk, egg or cod and in healthy controls. Analyses of fecal inflammatory biomarkers before and after the challenge were included. Methods: Twelve-year-old children from a population-based cohort reporting complete avoidance of milk, egg, cod or wheat due to perceived hypersensitivity were clinically examined and those with suspected food allergy were evaluated with a 3-session double-blind placebo-controlled food challenge (n = 18). Seven healthy controls participated in a double-blind challenge with egg. Before and after the challenge series, the cytokine mRNA expression was quantified for 13 cytokines discriminating between humoral Th2-, cytotoxic Thl-, regulatory Th3/Tr1- and inflammatory responses. Fecal calprotectin and eosinophil-derived neurotoxin (EDN) were also analyzed in children with suspected food allergy before and after the challenge series. Results: Pre challenge, children with suspected food allergy had higher IL-13 and TNF-alpha expression and lower IFN-gamma and IL-15 expression compared to healthy controls (all p < 0.05). Children with challenge proven food allergy had increased IL13 and IL-10 expression compared to the levels seen in negative challenges (p < 0.05). Post challenge, IL-1 beta and IL-6 mRNA levels were elevated in the food allergic children compared to controls (p < 0.05). Fecal calprotectin and EDN levels were higher in challenge-proven food allergy compared to a negative challenge although not statistically significantly. Conclusion & clinical relevance: Increased baseline mRNA levels of the Th2-related cytokine IL-13 and the regulatory cytokine IL-10 predicted a positive food challenge outcome. These cytokines in combination with fecal calprotectin and EDN might serve as future prognostic markers for symptomatic, IgEmediated food allergy but need further validation in a larger patient cohort.
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| 31. |
- Winberg, Anna, 1966-
(författare)
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Epidemiology of food hypersensitivity in school children : validation with double-blind placebo-controlled food challenges and biomarkers
- 2016
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Background: This thesis focuses on the incidence and remission of reported food hypersensitivity in schoolchildren followed from 8 to 12 -years of age and the prevalence of hypersensitivity to milk, egg, cod and wheat among 12-year olds investigated by reported data, clinical investigation and double-blind placebo-controlled food challenges and biomarkers.Methods: The studies are mainly based on a population based cohort recruited in 2006 from three municipalities in Northern Sweden. All children in first and second grade, aged 7-8 years, were invited to a parental questionnaire study and 2585 (96% of invited) participated. The children in two of the municipalities were also invited to a skin prick test with airborne allergens. At age 11-12 years, there was a follow-up of the cohort using the same methods, with the addition of a child interview and assessment of body mass index (BMI).At the follow-up, children who reported milk hypersensitivity were invited to structured interviews and children reporting complete elimination of milk, egg, cod or wheat due to perceived hypersensitivity were invited to a clinical examination and blood sampling. According to test results, the children were categorized into different food hypersensitivity phenotypes according to preset criteria. Children categorized as current food allergy were then invited to further evaluation with a double-blind placebo-controlled food-challenge using newly developed recipes. Before their use, the recipes were successfully validated regarding detectable sensorial differences between the active and placebo substances in a separate cohort of healthy schoolchildren (n=275).Before and after the challenge series blood samples were collected for analyses of cytokine mRNA expression in peripheral blood mononuclear cells including hallmark cytokines for the humoral allergy-promoting T helper (Th) 2 response, cellular cytotoxicity-promoting Th1 response, inflammatory-, and T regulatory responses. Fecal inflammatory biomarkers were also analyzed before and after the challenge series.Results: Reported food hypersensitivity increased from 21% at age 7-8 years to 26% at 11-12 years. There was a high incidence (15%) as well as a high remission (33%) of reported food hypersensitivity. Risk factors associated with incidence and remission were different for milk hypersensitivity and hypersensitivity to foods other than milk. The agreement between reported symptoms to milk, egg, cod, wheat, soy and peanut and sensitization to the culprit food was poor. At 11 to 12-years of age the prevalence of reported allergy to milk, egg, cod or wheat was 4.8% while the allergy prevalence according to clinical evaluation was 1.4%. This figure was further halved when evaluated with double-blind placebo-controlled food challenges.The majority of children with reported allergy to milk, egg, cod and wheat were categorized as other food hypersensitivity phenotypes, the most common being probable lactose intolerance (40%) and outgrown food allergy (19%). Even though reported milk hypersensitivity among the 11-12 year olds was 14.5%, only 3% were categorized as current milk allergy. Current and outgrown milk allergy was associated with other atopic disorders and a lower BMI (OR 0.8, 95% CI 0.80-0.98). Before the challenge series, the mRNA expression of the cytokines IL-13 and IL-10 were higher among children with a positive compared to a negative challenge outcome.Conclusion: Reported food hypersensitivity was common among school children in Northern Sweden and increased from 7-8 years to 11-12 years of age, and both the incidence and remission of reported hypersensitivity was high. There was an 8-fold difference in the prevalence of allergy to milk, egg, cod or wheat when reported data was assessed by clinical examinations and double-blind placebo-controlled food challenges. Allergy to milk, egg, cod and wheat was an uncommon cause of complete avoidance of these foods due to perceived hypersensitivity. Some of the analyzed biomarkers might serve as prognostic markers for symptomatic, IgE-mediated food allergy but need further validation.
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| 32. |
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| 33. |
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| 34. |
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| 35. |
- Winberg, Anna, et al.
(författare)
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High incidence and remission of reported food hypersensitivity in Swedish children followed from 8 to 12 years of age : a population based cohort study
- 2014
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Ingår i: Clinical and Translational Allergy. - : BioMed Central. - 2045-7022. ; 4
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Tidskriftsartikel (refereegranskat)abstract
- Background: Few population-based cohort studies have examined reported food hypersensitivity longitudinally. We investigated prevalence, incidence and remission of perceived food hypersensitivity among schoolchildren from 8 to 12 years of age, and risk factors associated with incidence and remission. Methods: A population-based cohort including all 7-8 year-old children in three Swedish towns was recruited in 2006. A total of 2,585 (96% of invited) children participated in a parental questionnaire. The children in two of the towns, n = 1,700 (90% of invited) also participated in skin-prick-testing with airborne allergens. The cohort was followed using the same methods at 11-12 years of age. At study follow up, specific IgE to foods was analyzed in a randomized subset of children (n = 652). Results: The prevalence of perceived food hypersensitivity increased from 21% at 8 years to 26% at 12 years of age. During this four-year-period, the cumulative incidence of food hypersensitivity was high (15%), as was remission (33%). This pattern was particularly evident for hypersensitivity to cow's milk, while the incidence of hypersensitivity to other foods was lower. Female sex, allergic heredity, current rhinitis and allergic sensitization were associated with the incidence of food hypersensitivity and allergic sensitization was negatively associated with remission. Risk-factor-patterns for both incidence and remission were different for hypersensitivity to milk compared with hypersensitivity to other foods. Generally, the agreement between reported food hypersensitivity and IgE-sensitization to the implicated food was poor. Conclusions: In this longitudinal, population-based cohort-study perceived food hypersensitivity was common among children between ages 8 and 12, often transient and not well correlated with food-specific IgE. While these findings suggest an overestimated prevalence of food hypersensitivity, the public-health-significance remains high as they reflect the perceived reality to which the children adapt their life and food intakes.
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| 36. |
- Winberg, Anna, 1966-, et al.
(författare)
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Milk allergy is a minor cause of milk avoidance due to perceived hypersensitivity among schoolchildren in Northern Sweden
- 2016
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Ingår i: Acta Paediatrica. - : Wiley. - 0803-5253 .- 1651-2227. ; 105:2, s. 206-214
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Tidskriftsartikel (refereegranskat)abstract
- AIM: We investigated phenotypes of milk hypersensitivity among schoolchildren aged 11-12 in Northern Sweden.METHODS: In a population-based cohort, 1,824 (98%) children aged 11-12 participated in a questionnaire survey, skin prick testing, interviews on food hypersensitivity and assessment of body mass index (BMI). Of the 265 children reporting milk hypersensitivity, milk avoidance and no celiac disease, 236 (89%) participated in a structured interview and blood samples for analyses of milk-specific Immunoglobulin E. The children were then categorised into milk hypersensitivity phenotypes according to preset criteria.RESULTS: In all, 14.5% reported milk hypersensitivity. Of these, 3% were categorised as current milk allergy, 23% as outgrown milk allergy, 40% as probable lactose intolerance and 11% were non-definable. Furthermore, 23% had discontinued their elimination diet. Milk allergy was associated with other atopic disorders and lower BMI, with an odds Ratio of 0.82 and 95% confidence interval of 0.80-0.98. Only 2% had previously undergone an oral challenge.CONCLUSION: The most common symptom phenotypes among Swedish children aged 11-12 with self-reported milk hypersensitivity and milk avoidance, were lactose intolerance and outgrown milk allergy while current milk allergy was uncommon. Children with milk allergy had a lower BMI and most lacked a challenge proven diagnosis.
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| 37. |
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| 38. |
- Winberg, Anna, 1966-, et al.
(författare)
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New validated recipes for double-blind placebo-controlled low-dose food challenges
- 2013
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Ingår i: Pediatric Allergy and Immunology. - : John Wiley & Sons. - 0905-6157 .- 1399-3038. ; 24:3, s. 282-287
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Tidskriftsartikel (refereegranskat)abstract
- Double-blind placebo-controlled food challenges are considered the most reliable method to diagnose or rule out food allergy. Despite this, there are few validated challenge recipes available. The present study aimed to validate new recipes for low-dose double-blind placebo-controlled food challenges in school children, by investigating whether there were any sensory differences between the active materials containing cow's milk, hen's egg, soy, wheat or cod, and the placebo materials. The challenge materials contained the same hypoallergenic amino acidbased product, with or without added food allergens. The test panels consisted of 275 school children, aged 810 and 1415yr, respectively, from five Swedish schools. Each participant tested at least one recipe. Standardized blinded triangle tests were performed to investigate whether any sensory differences could be detected between the active and placebo materials. In our final recipes, no significant differences could be detected between the active and placebo materials for any challenge food (p>0.05). These results remained after stratification for age and gender. The taste of challenge materials was acceptable, and no unfavourable side effects related to test materials were observed. In summary, these new validated recipes for low-dose double-blinded food challenges contain common allergenic foods in childhood; cow's milk, hen's egg, soy, wheat and cod. All test materials contain the same liquid vehicle, which facilitates preparation and dosing. Our validated recipes increase the range of available recipes, and as they are easily prepared and dosed, they may facilitate the use of double-blind placebo-controlled food challenges in daily clinical practice.
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| 39. |
- Winberg, Johanna, et al.
(författare)
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Chimerism Resulting From Parthenogenetic Activation and Dispermic Fertilization
- 2010
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Ingår i: American Journal of Medical Genetics, Part A. - : Wiley. - 1552-4825 .- 1552-4833. ; 152A:9, s. 2277-2286
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Tidskriftsartikel (refereegranskat)abstract
- Whole-body human chimerism is the result of two zygotes giving rise to one individual, and is a rarely detected condition. We have studied the molecular background and discuss the likely mechanism for the chimerism in a patient with a 46,XX/47,XY,+14 karyotype and ambiguous genitalia, cryptorchidism, pigment anomalies, and normal psychomotor development. We have used karyotyping, interphase-FISH and array-CGH analysis as well as molecular analysis of polymorphic markers from 48 loci in order to define the origin and percentage of 47,XY,+14 cells in different tissues. Based on the findings of two paternal alleles and the detection of homozygous maternal alleles without evidence of crossing-over, and the fact that four alleles were never detected, our results indicate that the chimerism in our patient is the result of dispermic fertilization of a parthenogenetically activated oocyte. Our report underlines that cytogenetic findings suggesting mosaicism might actually indicate chimerism as an underlying mechanism in patients. It also highlights the difficulties in predicting the clinical outcome in patients with genetic aberrations in mosaic or chimeric form.
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| 40. |
- Öhlund, Magnus, et al.
(författare)
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Food protein-induced enterocolitis syndrome among children in northern Sweden—A retrospective review from 2004–2018
- 2023
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Ingår i: Acta Paediatrica. - : John Wiley & Sons. - 0803-5253 .- 1651-2227. ; 112:7, s. 1558-1564
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Tidskriftsartikel (refereegranskat)abstract
- Aim: To describe clinical presentation and development of tolerance among children with Food protein-induced enterocolitis syndrome (FPIES) in a population in northern Sweden.Methods: A retrospective review of medical records of children presenting with FPIES symptoms from 1 January 2004, to 31 May 2018.Results: Sixty children (65% boys) with FPIES were included. The estimated incidence gradually increased to 0.45% in 2016–2017. The most common food triggers were cow's milk (40%), fish (37%) and oat (23%). Symptoms presented in 31 (60%) children before 6 months and in 57 (95%) before 1 year of age. The median age for FPIES diagnosis was 7 (range 3–134) months and for fish FPIES 13 (range 7–134) months. By 3 years of age, 67% of children with FPIES to milk and oat but none of the children with fish FPIES had developed tolerance. Allergic conditions like eczema and asthma were reported in 52% of the children.Conclusion: The cumulative FPIES incidence was 0.45% in 2016–2017. Most children presented with symptoms before 1 year of age, but the diagnosis was often delayed, especially for FPIES to fish. Tolerance development occurred at an earlier age when FPIES was triggered by milk and oat compared to fish.
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| 41. |
- Österlund, J., et al.
(författare)
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A 10-year review found increasing incidence trends of emergency egg allergy reactions and food-induced anaphylaxis in children
- 2019
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Ingår i: Acta Paediatrica. - : John Wiley & Sons. - 0803-5253 .- 1651-2227. ; 108:2, s. 314-320
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Forskningsöversikt (refereegranskat)abstract
- Aim: International reports have suggested that food allergies and food‐induced anaphylaxis have increased in children. We investigated the incidence of emergency food reactions over a 10‐year period.Methods: This study retrospectively reviewed the medical records of children presenting to Umeå University hospital, Sweden, with an emergency food reaction from January 1, 2006 to December 31, 2015. Cases were identified using discharge codes for allergies and anaphylaxis. Anaphylaxis cases were included if they fulfilled the international criteria.Results: We found emergency food allergy reactions in 519 children (58% boys) from 2006–2015 at a median age of 1.3 years. One‐third were hospitalised (32%) including 71/99 cases of anaphylaxis. Milk and eggs were the most commonly identified triggers. Emergency reactions to eggs increased during the study period with a Spearman rank correlation coefficient of 0.770 (p < 0.01) and the figures for anaphylaxis were 0.745 (p = 0.013). The incidence of food‐induced anaphylaxis increased and was 30 per 100 000 person‐years for the study period.Conclusion: Most of the emergency reactions, treated by secondary care paediatricians and emergency physicians, were to milk and eggs. Allergic reactions to eggs increased from 2006 to 2015, as did food‐related anaphylaxis.
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| 42. |
- Österlund, Jonas, et al.
(författare)
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Revised Swedish infant feeding guidelines are associated with earlier introduction of allergenic foods
- 2024
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Ingår i: Journal of Allergy and Clinical Immunology. - : Elsevier. - 0091-6749 .- 1097-6825. ; 153:2, s. 461-470
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Tidskriftsartikel (refereegranskat)abstract
- Background: Randomized controlled trials have demonstrated that early introduction of allergenic foods, such as peanut and egg, can reduce food allergy in high-risk children. Many international guidelines recommend introduction of allergenic foods in the first year of life, and accordingly, the Swedish National Food agency released updated guidelines in June 2019.Objective: Our aim was to examine whether the age at introduction and consumption frequency of allergenic foods have changed since release of the revised national guidelines on the introduction of solid foods in Sweden.Methods: Children born between June 2016 and December 2018 (n = 1925) were compared with children born between June 2019 and April 2021 (n = 1761) by using data from the NorthPop Birth Cohort study. Data on food introduction, eczema, and food allergy were prospectively collected until age 18 months by using web-based questionnaires. IgE sensitization was assessed at 18 age months.Results: The proportion of participants who had been introduced to egg, legume, soy products, peanut, almond, and cashew nut during the first year of life increased after implementation of the revised national guidelines. The most significant changes were seen for legume (from 55.2% to 69.8% [adjusted odds ratio = 1.90 (95% CI = 1.62-2.24)] and peanut (from 29.2% to 43.2% adjusted odds ratio = 1.87 (95% CI = 1.55-2.24)]); consumption frequency had also increased. No differences in the prevalence of eczema, food allergy, or sensitization to the foods of interest were found.Conclusion: Since release of the revised guidelines, infants in the general population are introduced to and consume a variety of allergenic foods earlier and more frequently; however, early manifestations of allergic disease have remained unchanged.
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