Seasonal Differences of 25-Hydroxyvitamin D Concentrations in Children and Adolescents from Mexico City and Metropolitan Area.

Autor:	Montiel-Ojeda D; Clinical Epidemiology Research Unit, Children's Hospital of Mexico Federico Gomez - Faculty of Medicine, National Autonomous University of Mexico UNAM, Mexico City, Mexico., Lopez-Gonzalez D; Clinical Epidemiology Research Unit, Children's Hospital of Mexico Federico Gomez - Faculty of Medicine, National Autonomous University of Mexico UNAM, Mexico City, Mexico., Guagnelli MÁ; Clinical Epidemiology Research Unit, Children's Hospital of Mexico Federico Gomez - Faculty of Medicine, National Autonomous University of Mexico UNAM, Mexico City, Mexico., Méndez Sánchez L; Clinical Epidemiology Research Unit, Children's Hospital of Mexico Federico Gomez - Faculty of Medicine, National Autonomous University of Mexico UNAM, Mexico City, Mexico.; Cochrane México - UNAM, National Autonomous University of Mexico, Mexico City, Mexico., Clark P; Clinical Epidemiology Research Unit, Children's Hospital of Mexico Federico Gomez - Faculty of Medicine, National Autonomous University of Mexico UNAM, Mexico City, Mexico.; Cochrane México - UNAM, National Autonomous University of Mexico, Mexico City, Mexico.
Jazyk:	angličtina
Zdroj:	Annals of nutrition & metabolism [Ann Nutr Metab] 2024 Nov 07, pp. 1-7. Date of Electronic Publication: 2024 Nov 07.
DOI:	10.1159/000542467
Abstrakt:	Introduction: Vitamin D deficiency is associated with bone metabolism and immune disorders. Radiation's seasonal variation affects vitamin D status more at the poles. In Mexico, near the equator, there have been reports of 10-20% vitamin D deficiency in children. There is no consensus on the definition of vitamin D deficiency, different organizations consider that a vitamin D level should be above 20-30 ng/mL. This study aimed to analyze vitamin D serum concentrations in children and adolescents from Mexico City and the Metropolitan Area (MA) during different seasons. Methods: Cross-sectional study in children and adolescents aged 5-20 years from Mexico City and Metropolitan Area, from autumn 2016 to winter 2017. Variables of interest such as anthropometric measurements, food consumption, and physical activity were analyzed. Results: A total of 816 children and adolescents were included. A high frequency of vitamin D deficiency was detected in 40.7% of the sample. The lowest vitamin D status occurred in winter 2016 and winter 2017. Conclusion: We found a higher frequency of vitamin D deficiency during winter in children and adolescents in Mexico City and MA. This risk persisted after adjusting for age, sex, body mass index Z-score, milk consumption, physical activity, and screen time. (© 2024 The Author(s). Published by S. Karger AG, Basel.)
Databáze:	MEDLINE
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