Vitamin D deficiency, bone turnover markers and causative factors among adolescents: a cross-sectional study (original) (raw)

2016, Journal of diabetes and metabolic disorders

This cross-sectional population-based study was conducted to elucidate the prevalence of vitamin D deficiency, bone turnover marker's variation and its influencing factors among adolescents of Tehran. Totally 444 middle and high school (53.6 % in high school) students (both girls and boys) were recruited. A short food frequency questionnaire designed to estimate dietary calcium and vitamin D consumption. Serum levels of calcium, phosphorus, parathyroid hormone (PTH), bone specific alkaline phosphates, 25 (OH) vitamin D, osteocalcin, cross-linked C-telopeptide (CTX), total protein, albumin and creatinine were determined. Vitamin D deficiency was prevalent in adolescents and only 22.4 % of students had normal serum vitamin D. Results revealed that vitamin D insufficiency reported in 34.2 % of students and vitamin D deficiency was in 43.3 % of them. Serum vitamin D, osteocalcin, CTX and bone specific alkaline phosphates were significantly higher in boys in all different ages. Serum...

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