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Vitamin D deficient – 1 in 3 of young Australians have less than 20 ng – March 2021

Prevalence and predictors of vitamin D deficiency in a nationally representative sample of Australian adolescents and young adults

European Journal of Clinical Nutrition (2021)
Kahlea Horton-French, Eleanor Dunlop, Robyn M. Lucas, Gavin Pereira & Lucinda J. Black

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Annual averages - much worse in winter


Vitamin D deficiency is a public health concern worldwide. Maintaining vitamin D sufficiency during growth periods is essential. We aimed to determine the prevalence and predictors of vitamin D deficiency in Australian adolescents and young adults.

We used data from adolescents (12–17 years, n = 692) and young adults (18–24 years, n = 400) who participated in the nationally representative 2011–2013 Australian Health Survey. Serum 25-hydroxyvitamin D concentrations were measured using a method certified to international standards, with prevalence reported for <50 (vitamin D deficiency), 50–<75, ≥75 and >125 nmol/L. Independent predictors of vitamin D deficiency were determined using a survey-weighted Poisson regression model.

Overall, 17% of adolescents and 32% of young adults were vitamin D deficient. In models adjusted for sex, age, region of birth, socioeconomic status, BMI and season (and education, smoking status and physical activity in young adults only), the prevalence ratio (PR) for vitamin D deficiency was more than double in participants born outside Australia (adolescents: PR 2.46; 95% confidence interval (CI) = 1.59, 3.81; young adults: PR 2.12; 95% CI = 1.46, 3.07), and also varied by season (adolescents: spring vs summer PR 2.47; 95% CI = 1.22, 5.01 and winter vs summer PR 2.01; 95% CI = 1.03, 3.92; young adults: winter vs summer; PR 3.32; 95% CI = 1.69, 6.53). Other predictors of vitamin D deficiency were overweight compared with healthy weight (adolescents) and lower physical activity (young adults).

Strategies based on safe sun exposure and dietary approaches are needed to achieve and maintain adequate vitamin D status, particularly in young adults.

Created by admin. Last Modification: Monday March 1, 2021 20:44:01 GMT-0000 by admin. (Version 10)

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15149 Australia less than 20 ng in Winterjpg.jpg admin 01 Mar, 2021 20:42 34.46 Kb 77
15148 Australia PR.jpg admin 01 Mar, 2021 20:20 50.20 Kb 150
15147 Austrialia D vs state.jpg admin 01 Mar, 2021 20:19 67.79 Kb 134
15146 Australian young adult deficiency.pdf PDF 2021 admin 01 Mar, 2021 20:19 706.56 Kb 139
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