{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T10:51:50Z","timestamp":1773226310014,"version":"3.50.1"},"reference-count":44,"publisher":"S. Karger AG","issue":"1","license":[{"start":{"date-parts":[[2012,12,12]],"date-time":"2012-12-12T00:00:00Z","timestamp":1355270400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"},{"start":{"date-parts":[[2012,12,12]],"date-time":"2012-12-12T00:00:00Z","timestamp":1355270400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.karger.com\/Services\/SiteLicenses"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ann Nutr Metab"],"published-print":{"date-parts":[[2013]]},"abstract":"<jats:p>&lt;b&gt;&lt;i&gt;Aims:&lt;\/i&gt;&lt;\/b&gt; The present study investigated whether sociodemographic factors and physical activity (PA) are associated with differences in serum 25-hydroxyvitamin D [25(OH)D] levels and whether these differences are associated with varying levels of endurance performance and body mass index (BMI) in children and adolescents. &lt;b&gt;&lt;i&gt;Subjects and Methods:&lt;\/i&gt;&lt;\/b&gt; Path analyses were based on data of a nationwide, cross-sectional German Health Interview and Examination Survey for Children (KiGGS; 2003 until 2006) for 25(OH)D and the embedded \u2018motor function module\u2019 for PA and endurance performance. The data were collected from 3,437 children and adolescents aged 6\u201317 years clustered in three age groups: 6\u201310, 11\u201313 and 14\u201317 years. &lt;b&gt;&lt;i&gt;Results:&lt;\/i&gt;&lt;\/b&gt; PA is affected by socioeconomic status and (non-)immigration background, 25(OH)D is only affected by (non-)immigration background and only in childhood. PA and 25(OH)D were not associated in those aged 11\u201313 years. In adolescence, lower 25(OH)D levels are associated with lower endurance performance and a higher BMI. &lt;b&gt;&lt;i&gt;Conclusions:&lt;\/i&gt;&lt;\/b&gt; Our results did not reveal a universally significant effect of sociodemographic factors on 25(OH)D. The association between 25(OH)D and endurance performance might reflect the effects of 25(OH)D on muscle function. Predictors of 25(OH)D status other than sunlight exposure and its health effects in the pediatric age group should be explored further.<\/jats:p>","DOI":"10.1159\/000343784","type":"journal-article","created":{"date-parts":[[2012,12,13]],"date-time":"2012-12-13T14:33:50Z","timestamp":1355409230000},"page":"55-62","source":"Crossref","is-referenced-by-count":11,"title":["Predictors of Differences in Vitamin D Levels in Children and Adolescents and Their Relation to Endurance 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