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- Pantazis, N, et al.
(författare)
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Determining the likely place of HIV acquisition for migrants in Europe combining subject-specific information and biomarkers data
- 2019
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Ingår i: Statistical methods in medical research. - : SAGE Publications. - 1477-0334 .- 0962-2802. ; 28:7, s. 1979-1997
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Tidskriftsartikel (refereegranskat)abstract
- In most HIV-positive individuals, infection time is only known to lie between the time an individual started being at risk for HIV and diagnosis time. However, a more accurate estimate of infection time is very important in certain cases. For example, one of the objectives of the Advancing Migrant Access to Health Services in Europe (aMASE) study was to determine if HIV-positive migrants, diagnosed in Europe, were infected pre- or post-migration. We propose a method to derive subject-specific estimates of unknown infection times using information from HIV biomarkers’ measurements, demographic, clinical, and behavioral data. We assume that CD4 cell count (CD4) and HIV-RNA viral load trends after HIV infection follow a bivariate linear mixed model. Using post-diagnosis CD4 and viral load measurements and applying the Bayes’ rule, we derived the posterior distribution of the HIV infection time, whereas the prior distribution was informed by AIDS status at diagnosis and behavioral data. Parameters of the CD4–viral load and time-to-AIDS models were estimated using data from a large study of individuals with known HIV infection times (CASCADE). Simulations showed substantial predictive ability (e.g. 84% of the infections were correctly classified as pre- or post-migration). Application to the aMASE study ( n = 2009) showed that 47% of African migrants and 67% to 72% of migrants from other regions were most likely infected post-migration. Applying a Bayesian method based on bivariate modeling of CD4 and viral load, and subject-specific information, we found that the majority of HIV-positive migrants in aMASE were most likely infected after their migration to Europe.
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- Jones, Benedict C, et al.
(författare)
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To which world regions does the valence-dominance model of social perception apply?
- 2021
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Ingår i: Nature Human Behaviour. - : Springer Science and Business Media LLC. - 2397-3374. ; 5:1, s. 159-169
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Tidskriftsartikel (refereegranskat)abstract
- Over the past 10 years, Oosterhof and Todorov's valence-dominance model has emerged as the most prominent account of how people evaluate faces on social dimensions. In this model, two dimensions (valence and dominance) underpin social judgements of faces. Because this model has primarily been developed and tested in Western regions, it is unclear whether these findings apply to other regions. We addressed this question by replicating Oosterhof and Todorov's methodology across 11 world regions, 41 countries and 11,570 participants. When we used Oosterhof and Todorov's original analysis strategy, the valence-dominance model generalized across regions. When we used an alternative methodology to allow for correlated dimensions, we observed much less generalization. Collectively, these results suggest that, while the valence-dominance model generalizes very well across regions when dimensions are forced to be orthogonal, regional differences are revealed when we use different extraction methods and correlate and rotate the dimension reduction solution. PROTOCOL REGISTRATION: The stage 1 protocol for this Registered Report was accepted in principle on 5 November 2018. The protocol, as accepted by the journal, can be found at https://doi.org/10.6084/m9.figshare.7611443.v1 .
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- Hoyler, Marguerite, et al.
(författare)
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Shortage of Doctors, Shortage of Data: A Review of the Global Surgery, Obstetrics, and Anesthesia Workforce Literature
- 2014
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Ingår i: World Journal of Surgery. - : Springer Science and Business Media LLC. - 1432-2323 .- 0364-2313. ; 38:2, s. 269-280
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Forskningsöversikt (refereegranskat)abstract
- The global surgery workforce is in crisis in many low- and middle-income countries (LMICs). The shortage of surgery, obstetrics, and anesthesia providers is an important cause of the unmet need for surgical care in LMICs. The goal of this paper is to summarize the available literature about surgical physicians in LMICs and to describe ongoing initiatives to supplement the existing surgical workforce data. We performed a systematic search and literature review of the English-language literature regarding the number of surgeons, obstetrician-gynecologists, and anesthesiologists practicing in LMICs. Literature describing the number of surgeons, obstetricians, and anesthesiologists practicing in LMICs represents a small minority of LMICs, and indicates consistently low levels of surgical physicians. Our literature search yielded comprehensive data for only six countries. No national data were found for 23 of the 57 countries considered by the World Health Organization (WHO) to be in health workforce 'crisis.' Across LMICs, general surgeon density ranged from 0.13 to 1.57 per 100,000 population, obstetrician density ranged from 0.042 to 12.5 per 100,000, and anesthesiologist density ranged from 0 to 4.9 per 100,000. Total anesthesiologist, obstetrician, and surgeon density was significantly correlated with gross domestic product (GDP) per capita (r (2) = 0.097, p = 0.0002). The global surgery workforce is in crisis, yet is poorly characterized by the current English-language literature. There is a critical need for systematically collected, national-level data regarding surgery providers in LMICs to guide improvements in surgery access and care. The Harvard Global Surgery Workforce Initiative and the WHO global surgical workforce database are working to address this need by surveying Ministries of Health and surgical professional organizations around the world.
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- Keller, P. S., et al.
(författare)
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Global CO2 emissions from dry inland waters share common drivers across ecosystems
- 2020
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Ingår i: Nature Communications. - : Nature Publishing Group. - 2041-1723. ; 11:1
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Tidskriftsartikel (refereegranskat)abstract
- Many inland waters exhibit complete or partial desiccation, or have vanished due to global change, exposing sediments to the atmosphere. Yet, data on carbon dioxide (CO2) emissions from these sediments are too scarce to upscale emissions for global estimates or to understand their fundamental drivers. Here, we present the results of a global survey covering 196 dry inland waters across diverse ecosystem types and climate zones. We show that their CO2 emissions share fundamental drivers and constitute a substantial fraction of the carbon cycled by inland waters. CO2 emissions were consistent across ecosystem types and climate zones, with local characteristics explaining much of the variability. Accounting for such emissions increases global estimates of carbon emissions from inland waters by 6% (~0.12 Pg C y−1). Our results indicate that emissions from dry inland waters represent a significant and likely increasing component of the inland waters carbon cycle.
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- Blundell, JE, et al.
(författare)
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Role of resting metabolic rate and energy expenditure in hunger and appetite control: a new formulation
- 2012
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Ingår i: Disease models & mechanisms. - : The Company of Biologists. - 1754-8411 .- 1754-8403. ; 5:5, s. 608-613
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Tidskriftsartikel (refereegranskat)abstract
- A long-running issue in appetite research concerns the influence of energy expenditure on energy intake. More than 50 years ago, Otto G. Edholm proposed that “the differences between the intakes of food [of individuals] must originate in differences in the expenditure of energy”. However, a relationship between energy expenditure and energy intake within any one day could not be found, although there was a correlation over 2 weeks. This issue was never resolved before interest in integrative biology was replaced by molecular biochemistry. Using a psychobiological approach, we have studied appetite control in an energy balance framework using a multi-level experimental system on a single cohort of overweight and obese human subjects. This has disclosed relationships between variables in the domains of body composition [fat-free mass (FFM), fat mass (FM)], metabolism, gastrointestinal hormones, hunger and energy intake. In this Commentary, we review our own and other data, and discuss a new formulation whereby appetite control and energy intake are regulated by energy expenditure. Specifically, we propose that FFM (the largest contributor to resting metabolic rate), but not body mass index or FM, is closely associated with self-determined meal size and daily energy intake. This formulation has implications for understanding weight regulation and the management of obesity.
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| 13. |
- Caretta, Martina Angela, et al.
(författare)
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Water
- 2022
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Ingår i: Climate Change 2022: Impacts, Adaptation and Vulnerability : Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change - Contribution of Working Group II to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change.
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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- Finlayson, L., et al.
(författare)
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The head shaft angle is associated with hip displacement in children at GMFCS levels III-V - A population based study
- 2018
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Ingår i: BMC Musculoskeletal Disorders. - : Springer Science and Business Media LLC. - 1471-2474. ; 19:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: An increased Head Shaft Angle (HSA) has been reported as a risk factor for hip displacement in children with cerebral palsy (CP) but opinions differ in the literature. The purpose of this study was to re-evaluate the relationship between HSA and hip displacement in a different population of children with CP. Methods: The Cerebral Palsy Integrated Pathway Scotland surveillance programme includes 95% of all children with CP in Scotland. The pelvic radiographs from 640 children in GMFCS levels III-V were chosen. The most displaced hip was analysed and the radiographs used were those taken at the child's first registration in the database to avoid the potential effects of surveillance on subsequent hip centration. A logistic regression model was used with hip displacement (migration percentage [MP] ≥40%) as outcome and HSA, GMFCS, age and sex as covariates. Results: The MP was ≥40% in 118 hips with a mean HSA of 164° (range 121-180°) and < 40% in 522 hips with a mean HSA of 160° (range 111-180°). The logistic regression analysis showed no significant influence of age and sex on MP in this population but a high GMFCS level was strongly associated with hip displacement. An increased HSA was also associated with hip displacement, a 10° difference in HSA for children adjusted for age, sex, and GMFCS gave an odds ratio of 1.26 for hip displacement equal or above 40% (p = 0.009) and hips with HSA above 164.5 degrees had an odds ratio of 1.96 compared with hips with HSA below 164.5 degrees (p = 0.002). Conclusion: These findings confirm that HSA is associated with hip displacement in children in GMFCS levels III-V.
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| 28. |
- Hopkins, M., et al.
(författare)
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The adaptive metabolic response to exercise-induced weight loss influences both energy expenditure and energy intake
- 2014
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Ingår i: European Journal of Clinical Nutrition. - : Springer Science and Business Media LLC. - 0954-3007 .- 1476-5640. ; 68:5, s. 581-586
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND/OBJECTIVES: A decline in resting energy expenditure (SEE) beyond that predicted from changes in body composition has been noted following dietary-induced weight loss. However, it is unknown whether a compensatory downregulation in REE also accompanies exercise (EX)-induced weight loss, or whether this adaptive metabolic response influences energy intake (El). SUBJECTS/METHODS: Thirty overweight and obese women (body mass index (BMI) =30.6 +/- 3.6 kg/m(2)) completed 12 weeks of supervised aerobic EX. Body composition, metabolism, El and metabolic-related hormones were measured at baseline, week 6 and post intervention. The metabolic adaptation (MA), that is, difference between predicted and measured SEE was also calculated post intervention (MA(post)), with SEE predicted using a regression equation generated in an independent sample of 66 overweight and obese women (BMI =31.0 +/- 3.9 kg/m(2)). RESULTS: Although mean predicted and measured SEE did not differ post intervention, 43% of participants experienced a greater-than-expected decline in SEE ( 102.9 +/- 77.5 kcal per day). MA(post) was associated with the change in leptin (r= 0.47; P=0.04), and the change in resting fat (r= 0.52; P=0.01) and carbohydrate oxidation (r= 0.44;P= 0.02). Furthermore, MApost was also associated with the change in El following EX (r= 0.44; P=0.01). CONCLUSIONS: Marked variability existed in the adaptive metabolic response to EX. Importantly, those who experienced a downregulation in SEE also experienced an upregulation in El, indicating that the adaptive metabolic response to EX influences both physiological and behavioural components of energy balance.
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| 29. |
- Lantz, Adam, et al.
(författare)
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Measuring the migration of surgical specialists
- 2020
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Ingår i: Surgery (United States). - : Elsevier BV. - 0039-6060 .- 1532-7361. ; 168:3, s. 550-557
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Tidskriftsartikel (refereegranskat)abstract
- Background: The lack of access to essential surgical care in low-income countries is aggravated by emigration of locally-trained surgical specialists to more affluent regions. Yet, the global diaspora of surgeons, obstetricians, and anesthesiologists from low-income and middle-income countries has never been fully described and compared with those who have remained in their country of origin. It is also unclear whether the surgical workforce is more affected by international migration than other medical specialists. In this study, we aimed to quantify the proportion of surgical specialists originating from low-income and middle-income countries that currently work in high-income countries. Methods: We retrieved surgical workforce data from 48 high-income countries and 102 low-income and middle-income countries using the database of the World Health Organization Global Surgical Workforce. We then compared this domestic workforce with more granular data on the country of initial medical qualification of all surgeons, anesthesiologists, and obstetricians made available for 14 selected high-income countries to calculate the proportion of surgical specialists working abroad. Results: We identified 1,118,804 specialist surgeons, anesthesiologists, or obstetricians from 102 low-income and middle-income countries, of whom 33,021 (3.0%) worked in the 14 included high-income countries. The proportion of surgical specialists abroad was greatest for the African and South East Asian regions (12.8% and 12.1%). The proportion of specialists abroad was not greater for surgeons, anesthesiologists, or obstetricians than for physicians and other medical specialists (P = .465). Overall, the countries with the lowest remaining density of surgical specialists were also the countries from which the largest proportion of graduates were now working in high-income countries (P = .011). Conclusion: A substantial proportion of all surgeons, anesthesiologists, and obstetricians from low-income and middle-income countries currently work in high-income countries. In addition to decreasing migration from areas of surgical need, innovative strategies to retain and strengthen the surgical workforce could involve engaging this large international pool of surgical specialists and instructors.
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| 30. |
- Miguet, Maud, et al.
(författare)
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Effects of aquatic exercise on appetitive responses in adolescents with obesity : An exploratory study
- 2023
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Ingår i: Appetite. - : ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD. - 0195-6663 .- 1095-8304. ; 185
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Tidskriftsartikel (refereegranskat)abstract
- Aquatic exercise has been suggested as a beneficial modality to improve weight loss, cardiorespiratory fitness and quality of life in adolescents with obesity; however, its impact on appetite control in youth remains unknown. The aim of this preliminary study was to examine the effect of an acute aquatic exercise session on energy intake (EI), appetite feelings and food reward in adolescents with obesity. Twelve adolescents with obesity (12-16 years, Tanner stage 3-5, 9 males) randomly completed two conditions: i) control (CON); ii) aquatic exercise session (AQUA). One hour before lunch, the adolescents stayed at rest outside the water in a quiet room for 45 min on CON while they performed a 45-min aquatic exercise session on AQUA. Ad libitum EI and macronutrients were assessed at lunch and dinner, subjective appetite feelings taken at regular intervals, and food reward measured before and after lunch. Paired T-test showed that EI was not different between CON and AQUA at lunch (1333 +/- 484 kcal vs 1409 +/- 593 kcal; p = 0.162) and dinner (528 +/- 218 kcal vs 513 +/- 204 kcal; p = 0.206). Total daily ad libitum EI was significantly higher on AQUA (1922 +/- 649 kcal) compared with CON (1861 +/- 685 kcal; p = 0.044) but accounting for the exercise-induced energy expenditure, relative energy intake did not differ (2263 +/- 732 kcal vs 2117 +/- 744 kcal, p = 0.304). None of the appetite feelings (hunger, fullness, prospective food consumption and desire to eat) and food reward dimensions were significantly different between conditions. These preliminary and exploratory results suggest that an acute aquatic-exercise session might not induce energy compensatory responses in adolescents with obesity.
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| 31. |
- Poole, Janet L., et al.
(författare)
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Fatigue as an understudied barrier to participation in life roles
- 2023
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Ingår i: OTJR (Thorofare, N.J.). - : Sage Publications. - 1539-4492 .- 1938-2383. ; 43:4, s. 583-591
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Tidskriftsartikel (refereegranskat)abstract
- Fatigue is one of the most burdensome and disabling symptoms in numerous acute and chronic conditions and is associated with reduced participation in all aspects of daily life, for example, parenting, employment, and socialization. Historically, occupational practitioners played key roles in fatigue management by creating and implementing interventions. The American Occupational Therapy Foundation convened a Planning Grant Collective workshop with the goal to develop collaborative research ideas and proposals to advance the understanding and management of fatigue. Participants from occupational therapy and other disciplines, with expertise with fatigue or who were conducting research on fatigue, participated in a 3-day virtual workshop. Four main topics emerged: implementation science, treatment taxonomy, trial design and comparative effectiveness, and phenotyping. This white paper describes the proceedings, summarizes the discussions, and outlines recommendations from the PGC workshop on fatigue.
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