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Low vitamin D in teens at 40 degrees North (Italy) due to not being outdoors, etc, May 2015

Hypovitaminosis D in adolescents living in the land of sun is correlated with incorrect life style: a survey study in Campania region

Annamaria Colao, Giovanna Muscogiuri, Manila Rubino, Laura Vuolo, Claudia Pivonello, Pasquale Sabatino, Mara Pizzo, Gelsomina Campanile, Rosa Fittipaldi, Gaetano Lombardi, …

VitaminDWiki Summary

373 healthy teens in Italy
(Note – the unhealthy teens probably have lower vitamin D)
79% teens had < 30 ng
Strongest association with low vitamin D in order were

  1. Lack of exercise (outdoor?)
  2. Smoking
  3. Obesity


Purpose: The aim of this study is to investigate in a population of adolescents living in Regione Campania, undergoing sun exposure at least 9 months per year the prevalence of severe deficiency (<20 ng/ml) or insufficiency (21–29 ng/ml) of 25-Hydroxyvitamin D (25(OH)D) levels and its relationship with individual body weight, use of smoking, and exercise performance.

Methods: From October 2012 to October 2013, 373 healthy subjects (153 girls, 223 boys 11–20 years) without chronic diseases were consecutively enrolled in a campaign to prevent metabolic, cardiovascular, and oncological diseases. 25(OH)D assay, BMI, and lifestyle habitudes (smoking and exercise indoor or outdoor) were assessed.

Results: In this population, median 25(OH) level was 25.0 ng/ml (95 %CI 23.8–25.2) without any difference between girls (25.0 (95 %CI 23.1–25.7)) and boys (24.3 (95 %CI 23.8–25.2)). Severe deficiency was found in 6 girls (0.02 %), while insufficiency was found in 296 patients (110 girls, 79.3 %). Normal levels were found in 71 patients (37 girls, 19 %). Vitamin D levels were significantly correlated with BMI (r = −0.429, p < 0.0001), smoking (r = −0.241; p < 0.0001), and exercise performance (r = 0.791; p < 0.0001). At the multistep regression analysis, Vitamin D levels were best predicted by
• exercise performance (t = 19.6, p < 0.0001),
• less smoking addiction (t = −4.97, p < 0.001), and
• lower BMI (t = −4.69, p < 0.0001).
Conclusions: The current study demonstrates that Vitamin D levels are commonly unsatisfactory in adolescents. Lower levels were found in overweight or obese adolescent, smokers and with low or absence of physical activity outdoors.

Publisher wants $40 for the PDF


Campania is at 40 degrees North
Image

A few cities at similar distance from Equator:
Denver, New York City, Beijing, Melbourne

See also VitaminDWiki

Attached files

ID Name Comment Uploaded Size Downloads
5526 Campania map.jpg admin 29 May, 2015 13:32 11.93 Kb 442
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