{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,10]],"date-time":"2024-08-10T00:04:10Z","timestamp":1723248250814},"reference-count":0,"publisher":"IMR Press","issue":"3-4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["International Journal for Vitamin and Nutrition Research"],"published-print":{"date-parts":[[2014,5,13]]},"abstract":"<jats:p> Aim: To determine the prevalence of vitamin D deficiency and associated factors among students of age 13 - 18 years. Methods: Design: Community-based cross sectional survey. Setting: Two schools were selected using multistage sampling techniques. Sampling: Cluster sampling of all enrolled students (550 students). Outcome Measures: Serum levels of 25-hydroxyvitamin D (25 OHD), parathyroid hormone and calcium. Data was collected about nutritional intake, physical activity and lifestyle variables that are potential risk factors for hypovitaminosis D. Results: Hypovitaminosis D prevalence was 23.8 %, of which 5.3 % was deficiency and 18.5 % insufficiency. Serum 25 OHD levels inversely correlated with parathyroid hormone levels (r = -0.206, P = 0.00). Low calcium and ionized calcium levels were 40.6 % and 45.9 %, respectively, and significantly correlated with vitamin D levels. Female students have significantly higher levels of hypovitaminosis D compared to males (29.3 % to 15.0 %, respectively) and the level of vitamin D significantly improved with increased age. Exposure to sun had a significant effect on vitamin D levels, and physical activity, soft drink consumption and smoking did not. Multinomial regression analysis revealed that age, sun exposure and Ca level were the only significant independent predictors of hypovitaminosis D among the studied group. Conclusion: Our findings revealed that hypovitaminosis D is a prevalent health problem in adolescents, especially girls, who were at higher risk, and increased age and sun exposure improved vitamin D status among the studied group. There is therefore a need to consider vitamin D supplementation for school children together with increased awareness through a health education program. <\/jats:p>","DOI":"10.1024\/0300-9831\/a000204","type":"journal-article","created":{"date-parts":[[2015,6,10]],"date-time":"2015-06-10T12:39:55Z","timestamp":1433939995000},"page":"0173-0182","source":"Crossref","is-referenced-by-count":4,"title":["Vitamin D, Parathormone and Associated Minerals among Students in Zagazig District, Sharkia Governorate, Egypt"],"prefix":"10.31083","volume":"84","author":[{"given":"Amal A.","family":"El Badawy","sequence":"first","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mona M.","family":"Aboserea","sequence":"additional","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Omnia S.","family":"El Seifi","sequence":"additional","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eman M.","family":"Mortada","sequence":"additional","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Huny M.","family":"Bakry","sequence":"additional","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eman H.","family":"Waly","sequence":"additional","affiliation":[{"name":"Public Health and Community Medicine Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nermin","family":"Raafat","sequence":"additional","affiliation":[{"name":"Biochemistry Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rasha L.","family":"Etewa","sequence":"additional","affiliation":[{"name":"Biochemistry Department, Faculty of Medicine, Zagazig University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samir A.","family":"El Badawy","sequence":"additional","affiliation":[{"name":"Rheumatology and Rehabilitation Department, Cairo University, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"16242","container-title":["International Journal for Vitamin and Nutrition Research"],"original-title":[],"language":"de","link":[{"URL":"https:\/\/econtent.hogrefe.com\/doi\/pdf\/10.1024\/0300-9831\/a000204","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,8,9]],"date-time":"2024-08-09T02:09:10Z","timestamp":1723169350000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.imrpress.com\/journal\/IJVNR\/84\/3-4\/10.1024\/0300-9831\/a000204"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,5,13]]},"references-count":0,"journal-issue":{"issue":"3-4","published-print":{"date-parts":[[2014,5,13]]}},"alternative-id":["10.1024\/0300-9831\/a000204"],"URL":"https:\/\/doi.org\/10.1024\/0300-9831\/a000204","relation":{},"ISSN":["0300-9831","1664-2821"],"issn-type":[{"type":"print","value":"0300-9831"},{"type":"electronic","value":"1664-2821"}],"subject":[],"published":{"date-parts":[[2014,5,13]]}}}