{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,8]],"date-time":"2026-09-08T17:21:14Z","timestamp":1788888074583,"version":"build-2803163510"},"reference-count":35,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T00:00:00Z","timestamp":1749600000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Public Health"],"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To assess the nutritional status of vitamin D and to analyze the influencing factors of vitamin D deficiency among children and adolescents.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Data from 1,827 children and adolescents aged 6\u201317 years from the nutrition and health surveillance of Zhejiang province, China, were analyzed. The serum concentration of 25-(OH)D were measured using High-Performance Liquid Chromatography-Tandem Mass Spectrometry. The prevalence of vitamin D deficiency and insufficiency were calculated. Ordinal regression were used to identify the influencing factors of vitamin D deficiency and insufficiency.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The mean 25-(OH)D concentration was 20.84 \u00b1 6.34 \u03bcg\/L. Among the participants, 37.4% had vitamin D insufficiency (25-(OH)D &amp;lt;20 \u03bcg\/L) and 7.8% had vitamin D deficiency (25-(OH)D &amp;lt;12 \u03bcg\/L). Age group (Wald <jats:italic>c<\/jats:italic><jats:sup>2<\/jats:sup> = 5.921, <jats:italic>p<\/jats:italic> = 0.015), sex (Wald <jats:italic>c<\/jats:italic><jats:sup>2<\/jats:sup> = 6.206, <jats:italic>p<\/jats:italic> = 0.013), overweight\/obesity (Wald <jats:italic>c<\/jats:italic><jats:sup>2<\/jats:sup> = 3.894, <jats:italic>p<\/jats:italic> = 0.048), and outdoor activity time (Wald <jats:italic>c<\/jats:italic><jats:sup>2<\/jats:sup> = 4.113, <jats:italic>p<\/jats:italic> = 0.043) were the influencing factors of children and adolescents with insufficiency\/deficiency vitamin D status.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our study assessed the nutritional status of vitamin D and analyzed the influencing factors of vitamin D deficiency among children and adolescents in the eastern coastal areas of China. The results indicated a significant prevalence of vitamin D insufficiency and deficiency. Key influencing factors included age group, sex, overweight\/obesity, and outdoor activity time. These findings highlight the need for targeted interventions to improve vitamin D levels in children and adolescents. Specifically, promoting adequate outdoor activity and addressing overweight\/obesity could be effective strategies to enhance vitamin D status in this population.<\/jats:p><\/jats:sec>","DOI":"10.3389\/fpubh.2025.1553077","type":"journal-article","created":{"date-parts":[[2025,6,11]],"date-time":"2025-06-11T04:10:09Z","timestamp":1749615009000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Vitamin D nutritional status and the influencing factors among children and 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