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Sökning: WFRF:(Michaëlsson Karl) > Wolk A

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1.
  • Benetou, V., et al. (författare)
  • Education, marital status, and risk of hip fractures in older men and women : the CHANCES project
  • 2015
  • Ingår i: Osteoporosis International. - : Springer Science and Business Media LLC. - 0937-941X .- 1433-2965. ; 26:6, s. 1733-1746
  • Tidskriftsartikel (refereegranskat)abstract
    • The role of socioeconomic status in hip fracture incidence is unclear. In a diverse population of elderly, higher education was found to be associated with lower, whereas living alone, compared to being married/cohabiting, with higher hip fracture risk. Educational level and marital status may contribute to hip fracture risk.INTRODUCTION: The evidence on the association between socioeconomic status and hip fracture incidence is limited and inconsistent. We investigated the potential association of education and marital status with hip fracture incidence in older individuals from Europe and USA.METHODS: A total of 155,940 participants (79 % women) aged 60 years and older from seven cohorts were followed up accumulating 6456 incident hip fractures. Information on education and marital status was harmonized across cohorts. Hip fractures were ascertained through telephone interviews/questionnaires or through record linkage with registries. Associations were assessed through Cox proportional hazard regression adjusting for several factors. Summary estimates were derived using random effects models.RESULTS: Individuals with higher education, compared to those with low education, had lower hip fracture risk [hazard ratio (HR) = 0.84, 95 % confidence interval (CI) 0.72-0.95]. Respective HRs were 0.97 (95 % CI 0.82-1.13) for men and 0.75 (95 % CI 0.65-0.85) for women. Overall, individuals living alone, especially those aged 60-69 years, compared to those being married/cohabiting, tended to have a higher hip fracture risk (HR = 1.12, 95 % CI 1.02-1.22). There was no suggestion for heterogeneity across cohorts (P heterogeneity > 0.05).CONCLUSIONS: The combined data from >150,000 individuals 60 years and older suggest that higher education may contribute to lower hip fracture risk. Furthermore, this risk may be higher among individuals living alone, especially among the age group 60-69 years, when compared to those being married/cohabiting.
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2.
  • Burgaz, Ann, et al. (författare)
  • 25-hydroxyvitamin D accumulation during summer in elderly women at latitude 60 degrees N
  • 2009
  • Ingår i: Journal of Internal Medicine. - : Wiley. - 0954-6820 .- 1365-2796. ; 266:5, s. 476-483
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVES: During half of the year, cutaneous synthesis of 25-hydroxyvitamin D (25(OH)D) is not detectable at northern latitudes, leaving the population dependent on other sources for optimal vitamin D status. During April to September, 25(OH)D status may be improved by solar exposure. In this study, we measured seasonal differences in serum 25(OH)D concentrations and identified the major predictors of summer 25(OH)D concentrations. DESIGN: We assessed serum 25(OH)D concentrations during both winter and summer amongst 100 women, aged 61-83 years, randomly sampled from the Swedish Mammography Cohort. Participants completed two detailed questionnaires covering diet, use of dietary supplements and sun-related behaviour, the first in January through March and a second time in August through September. RESULTS: The mean seasonal increase in serum 25(OH)D concentrations was 38% from mean 72 +/- 23 nmol L(-1) during winter to 99 +/- 29 nmol L(-1) in summer. High summer 25(OH)D concentrations were associated with higher winter concentrations, preference of staying in sun instead of shade, having a nonsensitive skin type and normal body mass index. Based on multiple linear regression modelling, preferring sun, having nonsensitive skin type and normal weight as compared with preferring shade, having sensitive skin type and being obese, was associated with a 64 nmol L(-1) higher 25(OH)D concentrations during summer. CONCLUSIONS: Women with high winter 25(OH)D serum concentrations, with preference of staying in the sun instead of shade during summer, a skin type allowing for longer sun exposure and a normal weight had the highest summer 25(OH)D concentrations.
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3.
  • Burgaz, A., et al. (författare)
  • Confirmed hypertension and plasma 25(OH)D concentrations amongst elderly men
  • 2011
  • Ingår i: Journal of Internal Medicine. - : Wiley. - 0954-6820 .- 1365-2796. ; 269:2, s. 211-218
  • Tidskriftsartikel (refereegranskat)abstract
    • Objectives. The results of experimental studies suggest that vitamin D deficiency activates the renin-angiotensin system and predisposes to hypertension. Results of previous epidemiological studies investigating the association between 25-hydroxyvitamin D [25(OH)D] status and hypertension have not been consistent, perhaps because of their sole reliance on office blood pressure (BP) measurements leading to some misclassification of hypertension status. No previous studies have examined the association between 25(OH)D status and confirmed hypertension assessed with both office and 24-h BP measurements. Design. In this cross-sectional study, we investigated 833 Caucasian men, aged 71 +/- 0.6 years, to determine the association between plasma 25(OH)D concentrations, measured with high-pressure liquid chromatography mass spectrometry, and the prevalence of hypertension. We used both supine office and 24-h BP measurements for classifying participants as normotensive or confirmed hypertensive; participants with inconsistent classifications were excluded. Results. In a multivariable adjusted logistic regression model, men with 25(OH)D concentrations < 37.5 nmol L-1 had a 3-fold higher prevalence of confirmed hypertension compared to those with >= 37.5 nmol L-1 25(OH)D (odds ratio = 3.3, 95% CI: 1.0-11.0). Conclusions. Our results show that low plasma 25(OH)D concentration is associated with a higher prevalence of confirmed hypertension.
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