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Familial clustering of vitamin D deficiency via shared environment: The Korean National Health and Nutrition Examination Survey 2008-2012.

Abstract：

BACKGROUND/OBJECTIVES:Familial correlation of serum 25-hydroxyvitamin D concentration (25(OH)D) was reported in twin- or parent-offspring studies. However, data on relative contribution of environmental factors on familial clustering of 25(OH)D in extended families are limited. SUBJECTS/METHODS:We performed cross-sectional study using data from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008-2012. Familial correlations of 25(OH)D were estimated in 28,551 subjects from 10,882 families. The variance component method was used to assess the relative contribution of additive genetic or environmental contributions to the variation in 25(OH)D level. Logistic regression models with interaction term were built to evaluate the differential influence of parental vitamin D status on the adolescents and adults offspring. RESULTS:Mean serum 25(OH)D concentration of subjects was 44.6 nmol/L (vitamin D insufficiency (30-50 nmol/L), 51%; vitamin D deficiency ( < 30 nmol/L), 17%). Familial clustering explained 40% of the total variation in 25(OH)D. In the variance component model, 4%, 39%, and 57% of the variation in serum 25(OH)D level was attributed to additive genetic, common shared environmental, and individual environmental factors, respectively. The odds of vitamin D deficiency in offspring with both parents with vitamin D deficiency compared with those with both parents with sufficient vitamin D levels was greater in adolescents ( < 19 years) than in adults ( ≥ 19 years) (odds ratio = 41.1 vs. 12.5; p for interaction = 0.03). CONCLUSIONS:We found a familial clustering of vitamin D deficiency in a large family-based cohort. Parental influence on vitamin D status of offspring was greater in adolescents than in adults.

journal_name

Eur J Clin Nutr

journal_title

European journal of clinical nutrition

authors

Hong N,Lee YK,Rhee Y

doi

10.1038/s41430-018-0157-3

subject

Has Abstract

pub_date

2018-12-01 00:00:00

pages

1700-1708

issue

eissn

0954-3007

issn

1476-5640

pii

10.1038/s41430-018-0157-3

journal_volume

pub_type

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Familial clustering of vitamin D deficiency via shared environment: The Korean National Health and Nutrition Examination Survey 2008-2012.