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- Ahlqvist Lindqvist, Emma, et al.
(author)
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Psychometric assessment of the Swedish version of the injustice experience questionnaire among patients with chronic pain
- 2021
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In: Scandinavian Journal of Pain. - : Walter de Gruyter. - 1877-8860 .- 1877-8879. ; 21:4, s. 732-742
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Journal article (peer-reviewed)abstract
- ObjectivesThe use of the Injustice Experience Questionnaire (IEQ) in psychological assessment of individuals with chronic pain is supported by research. The psychometric properties of the Swedish version, the IEQ-S, has not yet been evaluated. Hence, the aim was to investigate structural validity, and concurrent criterion validity of the IEQ-S against the Work Ability Index (WAI), the Pain Catastrophizing Scale (PCS-SW), the Patient Health Questionnaire 9-item depression module (PHQ-9), and the Generalized anxiety disorder 7-item scale (GAD-7). Internal consistency and test-retest reliability were also studied.MethodsSixty-five participants, referred to a University hospital, with a pain duration over three months were consecutively sampled. They completed the IEQ-S at admission and again within six weeks. A confirmatory factor analysis was performed for the study of structural validity. Concurrent criterion validity was evaluated using Spearman’s correlation coefficient. Internal consistency reliability for the full IEQ-S was calculated using the Cronbach’s alpha. Test-retest reliability was calculated using an Intraclass Correlation Coefficient (ICC).ResultsThe median total score (0–48, where high scores indicate high levels of injustice) at admission (test 1) was 27.0 (n=64), 25th percentile=15.3, 75th percentile=37.8, range=3–48 points. A one-factor model was supported with item-loadings between 0.67–0.92. Spearman’s correlation coefficient between the IEQ-S and the WAI (n=56) was r S =−0.46; the PCS-SW (n=63) was r S =0.68, the PHQ-9 (n=64) was r S =0.50 and the GAD-7 (n=64) was r S =0.57, p<0.01. Cronbach’s alpha was 0.94 (n=64). The ICC was 0.80 (n=55), with a 95% confidence interval, ranging between 0.69–0.88.ConclusionsOur study supported structural validity and concurrent criterion validity of the IEQ-S against other measures of psychological constructs and work ability. It also supported the internal consistency reliability of the IEQ-S and the test-retest reliability with a retest interval up to six weeks, was good. These findings support the use of the IEQ-S as an adjunct tool to assess appraisals of injustice in patients with chronic pain who are referred to tertiary care in Sweden. The added value might be identification of those who are at risk for slow or no improvement in their pain condition over time, and sick-leave, but this has to be confirmed in future studies.
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- Ahlqvist, Max, et al.
(author)
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Probabilistic evaluation of the Step-Stress fatigue testing method considering cumulative damage
- 2023
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In: Probabilistic Engineering Mechanics. - : ELSEVIER SCI LTD. - 0266-8920 .- 1878-4275. ; 74
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Journal article (peer-reviewed)abstract
- A general testing and analysis framework for the Step-Stress fatigue testing method is identified, utilizing interval-censored data and maximum likelihood estimation in an effort to improve estimation of fatigue strength distribution parameters has been performed. The Step-Stress methods limitations are characterized, using a simple material model that considers cumulative damage to evaluate load history effects. In this way, the performance including cumulative damage was evaluated and quantified using a probabilistic approach with Monte-Carlo simulations, benchmarked against the Staircase method throughout the work. It was found that the Step-Stress method, even when cumulative damage occurs to a wide extent, outperforms the Staircase method, especially for small sample sizes. Furthermore, positive results reaches further than the increase performance in estimating fatigue strength distribution parameters, where improvements in secondary information, i.e. S-N data gained from failure specimens, are shown to be distributed more closely to the fatigue life region of interest.
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- Almevall, Ariel, et al.
(author)
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Exploring the meaning of a good life for older widows with extensive need of care: a qualitative in-home interview study
- 2024
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In: International Journal of Qualitative Studies on Health and Well-being. - : Taylor & Francis. - 1748-2623 .- 1748-2631. ; 19:1
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Journal article (peer-reviewed)abstract
- Introduction: Studies of older women’s life transitions is rare but gains relevance as the aging population, with older women as the majority, expands.Purpose: To explore the meaning of a good life for older widows with extensive home care needs.Materials and methods: Semi-structured interviews were carried out with eleven women, aged 80 and over (82–95 years, mean 90) residing at home with extensive care needs (≥4 daily sessions, averaging 2.5–6 hours, mean 3). Data were analysed by reflexive thematic analysis.Results: The theme “This Day in My Home, the frame of my life” reflects the women’s experience of a good life. A good day imbued them with hope, trust and security, carrying them forward with the assurance that night would usher in a new day. However, there were moments when life was merely about navigating daily challenges. During such days, the women felt trapped in time, unsafe and lonely.Conclusion: A day at home may seem static, yet it mirrors life’s dynamism, evolving with shifting circumstances. Older widows navigate challenges while maintaining their sense of self, independence, and connection to home. These findings have implications for aged care, recognizing the multifaceted aspects of life and the centrality of home.
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- Beers Fägersten, Kristy
(author)
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The appropriation of media texts as conversational and pragmatic strategies
- 2007
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In: 10th Conference of the International Pragmatics Association. - Gothenburg, Sweden.
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Conference paper (peer-reviewed)abstract
- A cornerstone of pragmatic theories of the interpretation or negotiation of meaning is the concept of common ground (Stalnaker, 1978), common knowledge (Lewis, 1969), or joint knowledge (McCarthy, 1990), which Clark (1996:92) refers to as the “sine qua non for everything we do with others.” One thing we often do with others is watch television or movies, and subsequently we secure these activities as common ground through talk. In this paper, I analyze conversations among family members whose use of quoting from the dialogue of films and television programs represents conversational strategies whereby common ground is exploited for different purposes. In particular, quoting is shown to be used by children to showcase knowledge and hold the floor, and by parents to establish alignments with other members of the family or indirectly opinionate on an on-going conversation between other family members. The data come from recorded conversations among members of a four-person, Swedish-American family. Each family member speaks Swedish and English and uses both on a daily basis. Three members of the family also speak German and use it on a near-daily basis. The shared linguistic knowledge among the family members therefore represents an additional common ground, which enables the appropriation of media texts in different languages. The integration of quotes from film or television texts into conversation often results in code-switching and, due to the languages typically associated with the different possible familial dyads, crossing (Rampton, 1995) can be said to occur as well. The appropriation of a media text is therefore identified as an appropriation of and alignment with a linguistic identity, resulting in additional challenges to interlocutors with regards to the negotiation of meaning.
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- Berglin, Ewa, MD, PhD, 1955-, et al.
(author)
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Protein profiling in individuals before onset of anca-associated vasculitis
- 2020
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In: Annals of the Rheumatic Diseases. - : BMJ Publishing Group Ltd. - 0003-4967 .- 1468-2060. ; 79, s. 372-372
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Journal article (other academic/artistic)abstract
- Etiology and pathogenesis of ANCA-associated vasculitis (AAV) is multifactorial and understanding of the processes leading from a healthy immune system to autoimmunity and on to debut of symptoms in AAV is rudimentary.Objectives:To identify inflammatory proteins related to the early processes preceding AAV development, and potential novel biomarkers, using large-scale protein analysesMethods:The Swedish National Patient Register of in-patient carevand the Swedish Cause of Death Register with discharge diagnosis from ICD-9 and-10 for AAV were co-analysed with the registers of 4 different blood biobanks to identify AAV individuals with available samples predating onset of symptom. Of the pre-AAV cases 86 (36 male, 50 female; mean age (SD); 51.9 (16.9) years) were identified with at least one plasma or serum sample (28 plasma, and 100 serum) pre-dating symptom onset (mean (SD); -4.3 (3.1) years), and 14 had 2-3 samples. Serum and plasma control samples matched for sex, age and sampling date were identified (n=198; 82 male, 116 female; mean age (SD); 51.9±15.9 years). The samples were analysed for levels of 92 proteins using proximity extension assay (OLINK inflammation panel, SciLifeLab, Uppsala, Sweden). Data were analysed using routine statistical methods, random forest and Partial Least square-discriminant analysis (PLS-DA).Results:As previously described for the assay significant difference between plasma and serum samples were observed both in pre-AAV individuals and controls. In pre-AAV plasma samples significantly increased concentrations of interleukin (IL)-2, chemokine ligand (CCL)-4, fibroblast growth factor (FGF)21, IL-4 and CCL20 were found closer to symptom onset, (<5 years) than later (> 5 years) and compared with controls. In serum tumor necrosis factor receptor superfamily member (TNFRSF)9, CXCL9, osteoprotegerin and vascular endothelial growth factor-A were significantly increased <5 years before onset vs. later (>5 years) and compared with controls. PLS-DA score scattered plot separated the pre-AAV individuals from healthy controls (R2=0.26), with significantly increased levels of CCL23, CXCL5, and matrix metalloproteinases-1 (MMP-1),transforming growth factor-ß, orosomucoid, en-rage (S100A12) and IL-7 and decreased FGF-19 level in serum. Binary logistic regression analyses comparing tertiles for these proteins confirmed significantly increased odds ratios for disease development of CCL23, CXCL5 and MMP-1. The findings were confirmed in random forest analysis where these factors were among the 20 most discriminatory factors between pre-symptomatic AAV and controls.Conclusion:In serum samples collected years before symptom onset of AAV, proteins involved in immune system activation were increased, suggesting that the inflammatory process is initiated long before clinical manifestations of the disease appear. These findings propose the elevated proteins as novel biomarkers for disease progression.References:[1]Watts et al. Ann Rheum Dis 2007;66:222-22Acknowledgments:Vasculitis Foundation, USADisclosure of Interests:Ewa Berglin: None declared, Anders Esberg: None declared, Johanna Dahlqvist: None declared, Johanna Sjöwall: None declared, Anders Lundquist: None declared, Kristina Lejon: None declared, Ingegerd Johansson: None declared, Aladdin J Mohammad Speakers bureau: lecture fees from Roche and Elli Lilly Sweden, PI (GiACTA study), Solbritt Rantapää Dahlqvist: None declared
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| 10. |
- Burman, Magnus, 1966-, et al.
(author)
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Blister propagation in sandwich panels
- 2019
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In: Journal of Sandwich Structures and Materials. - : SAGE Publications Ltd. - 1099-6362 .- 1530-7972. ; 21:5, s. 1683-1699
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Journal article (peer-reviewed)abstract
- This paper deals with the problem of face/core interfacial disbonds in sandwich panels that are pressurised, i.e. the disbond has an initial fluid pressure that causes the disbond to deform. The problem is often referred to as a blister. The panel with a blister is then subjected to an in-plane compressive load. Four different panels are analysed and tested, having different size disbonds and different initial internal pressure. The cases are analysed using a finite element approach where the blister is modelled using fluid elements enabling the pressure inside the blister to vary as the in-plane load is applied. The analysis uses non-linear kinematics, and in each load step, the energy release rate is calculated along the disbond crack front. This model is used for failure load predictions. The four cases are then tested experimentally by filling a pre-manufactured disbond cavity with a prescribed volume of air. This air volume is then entrapped, and the panel is subjected to an in-plane compressive load. The load and blister pressures are measured throughout the test and compared with the finite element analysis. Surface strains and blister deformations are also measured using digital correlation measurements. The predicted failure loads compare well with the experimental results, and so does the blister pressures, the latter at least qualitatively. © The Author(s) 2019.
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