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Title: Association of vitamin D with adiposity measures and other determinants in a cross-sectional study of Cypriot adolescents
Authors: Kolokotroni, Ourania 
Papadopoulou, Anna 
Yiallouros, Panayiotis K. 
Raftopoulos, Vasilios 
Kouta, Christiana 
Lamnisos, Demetris 
Nicolaidou, Polyxeni 
Middleton, Nicos 
Keywords: Vitamin D;Adolescents;Predictors;Adiposity;BMI;Body fat percentage
Category: Health Sciences
Field: Medical and Health Sciences
Issue Date: 2015
Publisher: Cambridge University Press
Source: Public Health Nutrition, Volume 18, Issue 1, Pages 112-121, 2015
Abstract: Objective to assess vitamin D status among Cypriot adolescents and investigate potential determinants including BMI and body fat percentage (BF%).Design Participants had cross-sectional assessments of serum vitamin D, physical activity, dietary vitamin D intake and sun exposure. Linear and logistic regression models were used to explore the associations of vitamin D with potential predictors.Setting Hospitals, Cyprus, November 2007–May 2008.Subjects Adolescents (n 671) aged 16–18 years.Results Mean serum vitamin D was 22·90 (sd 6·41) ng/ml. Only one in ten children had sufficient levels of vitamin D (≥30 ng/ml), while the prevalence of vitamin D deficiency (12–20 ng/ml) and severe deficiency (<12 ng/ml) was 31·7 % and 4·0 %, respectively. Lower vitamin D was associated with winter and spring season, female gender, reduced sun exposure in winter and darker skin. Participants with highest BMI and BF% when compared with a middle reference group had increased adjusted odds of vitamin D insufficiency (OR = 3·00; 95 % CI 1·21, 7·45 and OR = 5·02; 95 % CI 1·80, 13·97, respectively). A similar pattern, although not as strong, was shown for vitamin D deficiency with BF% (OR = 1·81; 95 % CI 1·04, 3·16) and BMI (OR = 1·51; 95 % CI 0·85, 2·67). Participants in the lowest BMI and BF% groups also displayed compromised vitamin D status, suggesting a U-shaped association.Conclusions Vitamin D deficiency in adolescence is very prevalent in sunny Cyprus, particularly among females, those with darker skin and those with reduced sun exposure in winter. Furthermore, vitamin D status appears to have a U-shaped association with adiposity measures.
DOI: 10.1017/S1368980013003480
Rights: ©The Authors 2014
Type: Article
Appears in Collections:Άρθρα/Articles

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