dc.contributor.author | Öberg, Eva Gunnel Johanna | |
dc.contributor.author | Jorde, Rolf | |
dc.contributor.author | Almås, Bjørg | |
dc.contributor.author | Nielsen, Christopher Sivert | |
dc.contributor.author | Gerds, Thomas Alexander | |
dc.contributor.author | Cashman, Kevin D. | |
dc.contributor.author | Grimnes, Guri | |
dc.date.accessioned | 2024-02-19T19:44:11Z | |
dc.date.available | 2024-02-19T19:44:11Z | |
dc.date.created | 2024-02-19T10:24:18Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Journal of Clinical Endocrinology and Metabolism (JCEM). 2023, 00 1-11. | |
dc.identifier.issn | 0021-972X | |
dc.identifier.uri | https://hdl.handle.net/11250/3118534 | |
dc.description.abstract | Context: Longitudinal data regarding vitamin D status in adolescence is scarce. This study presents population-based data from an Arctic adolescent population (n = 589) at 16 and 18 years. Objective: The aims of this study were to investigate changes in vitamin D status during 2 years in adolescence, and whether lifestyle changes were associated with serum 25-hydroxyvitamin D (s-25(OH)D) at follow-up. Methods: Fit Futures is a longitudinal study at 69°N in Norway. Participants had their s-25(OH)D levels analyzed in their first and third year of upper secondary school (median age 16 and 18 years), in Fit Futures 1 (FF1) and Fit Futures 2 (FF2), respectively. Self-reported lifestyle habits were registered through questionnaires. The association between lifestyle changes and s-25(OH)D levels at follow-up were calculated by regression analyses, controlling for baseline s-25(OH)D levels. Results: Longitudinal data were available for 309 girls and 280 boys. The proportion of adolescents with s-25(OH)D <50 nmol/L were 73.7% in FF1 and 77.1% in FF2, while the proportion <30 nmol/L constituted 35.7% in FF1 and 40.9% in FF2. Of those with s-25(OH)D <30 nmol/L (severe vitamin D deficiency) in FF1, 73.3% remained severely deficient in FF2. Among boys, an increase in UV exposure was significantly associated with higher s-25(OH)D levels in FF2 (beta; CI [nmol/L] 12.9; 9.1, 16.7). In girls, decreased vitamin/mineral supplement intake was significantly associated with lower s-25(OH)D at FF2 (−6.7; −10.2, −3.1), while increased UV (10.8; 7.0, 14.7) and combined hormonal contraceptive exposure (12.1; 6.0, 18.1) in FF2 was significantly associated with higher s-25(OH)D levels in FF2. Conclusion: Severe vitamin D deficiency was prevalent throughout adolescence. Lifestyle changes may alter s-25(OH)D levels in this age group. | |
dc.language.iso | eng | |
dc.title | Vitamin D Status During Adolescence and the Impact of Lifestyle Changes: 2 Years’ Follow-up From the Fit Futures Study | |
dc.title.alternative | Vitamin D Status During Adolescence and the Impact of Lifestyle Changes: 2 Years’ Follow-up From the Fit Futures Study | |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.description.version | publishedVersion | |
dc.source.pagenumber | 1-11 | |
dc.source.volume | 00 | |
dc.source.journal | Journal of Clinical Endocrinology and Metabolism (JCEM) | |
dc.identifier.doi | 10.1210/clinem/dgad655 | |
dc.identifier.cristin | 2247405 | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |