High prevalence of vitamin D deficiency in school-age children in Tehran, 2008: a red alert
| Autor: | Nasrin Omidvar, Telma Zowghi, Ali Kalayi, Nastaran Shariatzadeh, A'azam Gharavi, Homa Haidari, Majid Hajifaraji, Niloufar Khalaji, Mohammad Reza Eshraghian, Bahareh Nikooyeh, Tirang R. Neyestani |
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| Rok vydání: | 2011 |
| Předmět: |
Male
medicine.medical_specialty Daily intake Medicine (miscellaneous) Iran vitamin D deficiency Body Mass Index Sex Factors Internal medicine Prevalence medicine Vitamin D and neurology Humans Vitamin D Child Nutrition and Dietetics School age child High prevalence Bone Density Conservation Agents biology business.industry Public Health Environmental and Occupational Health Vitamin D Deficiency medicine.disease Health Surveys Calcium Dietary Cross-Sectional Studies Endocrinology Parathyroid Hormone Sunlight Osteocalcin biology.protein Population study Female Sun exposure business |
| Zdroj: | Public Health Nutrition. 15:324-330 |
| ISSN: | 1475-2727 1368-9800 |
| Popis: | ObjectiveTo assess the vitamin D status of 9–12-year-old primary-school children in Tehran during autumn and winter 2007–2008.DesignA descriptive cross-sectional study.SettingPrimary schools of Tehran city, Iran.SubjectsA total of 1111 children aged 9–12 years (573 boys and 538 girls) from sixty primary schools were enrolled in the study. Weight, height, BMI and serum levels of Ca, P, Mg, 25-hydroxyvitamin D (25(OH)D), intact parathyroid hormone (iPTH), osteocalcin and bone-specific alkaline phosphatase of all the participants were assessed. Dietary Ca intake was also evaluated using a quantitative FFQ for a subsample of the study population (n 503). Vitamin D sufficiency was defined on the basis of serum levels of 25(OH)D as either ≥37 nmol/l (criterion 1) or ≥50 nmol/l (criterion 2).ResultsDaily intake of Ca did not differ significantly between boys and girls (929·6 (sd 436·7) mg and 909·5 (sd 465·5) mg, respectively). However, on the basis of the first criterion, approximately 86 % of the children had vitamin D deficiency, with 38·3 % being severely deficient (25(OH)D < 12·5 nmol/l). According to the second criterion, prevalence of vitamin D deficiency rose to 91·7 %. Prevalence of vitamin D deficiency was higher in girls than in boys by either criterion. Serum levels of 25(OH)D inversely correlated with iPTH (r = −0·154, P < 0·001) and BMI (r = −0·092, P = 0·002) but directly correlated with duration of sun exposure (r = 0·115, P < 0·001).ConclusionsThe high prevalence of vitamin D deficiency among schoolchildren (especially among girls) warrants immediate interventions for proper nutritional support. |
| Databáze: | OpenAIRE |
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