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- Title
Vitamin D deficiency prevalence and risk factors among pregnant Chinese women.
- Authors
Chunfeng Yun; Jing Chen; Yuna He; Deqian Mao; Rui Wang; Yu Zhang; Chun Yang; Jianhua Piao; Xiaoguang Yang; Yun, Chunfeng; Chen, Jing; He, Yuna; Mao, Deqian; Wang, Rui; Zhang, Yu; Yang, Chun; Piao, Jianhua; Yang, Xiaoguang
- Abstract
<bold>Objective: </bold>To evaluate vitamin D deficiency prevalence and risk factors among pregnant Chinese women.<bold>Design: </bold>A descriptive cross-sectional analysis.<bold>Setting: </bold>China National Nutrition and Health Survey (CNNHS) 2010-2013.<bold>Subjects: </bold>A total of 1985 healthy pregnant women participated. Possible predictors of vitamin D deficiency were evaluated via multiple logistic regression analyses.<bold>Results: </bold>The median serum 25-hydroxyvitamin D level was 15·5 (interquartile range 11·9-20·0, range 3·0-51·5) ng/ml, with 74·9 (95 % CI 73·0, 76·7) % of participants being vitamin D deficient (25-hydroxyvitamin D <20 ng/ml). According to the multivariate logistic regression analyses, vitamin D deficiency was positively correlated with Hui ethnicity (P=0·016), lack of vitamin D supplement use (P=0·021) and low ambient UVB level (P<0·001). In the autumn months, vitamin D deficiency was related to Hui ethnicity (P=0·012) and low ambient UVB level (P<0·001). In the winter months, vitamin D deficiency was correlated with younger age (P=0·050), later gestational age (P=0·035), higher pre-pregnancy BMI (P=0·019), low ambient UVB level (P<0·001) and lack of vitamin D supplement use (P=0·007).<bold>Conclusions: </bold>Vitamin D deficiency is prevalent among pregnant Chinese women. Residing in areas with low ambient UVB levels increases the risk of vitamin D deficiency, especially for women experiencing advanced stages of gestation, for younger pregnant women and for women of Hui ethnicity; therefore, vitamin D supplementation and sensible sun exposure should be encouraged, especially in the winter months. Further studies must determine optimal vitamin D intake and sun exposure levels for maintaining sufficient vitamin D levels in pregnant Chinese women.
- Subjects
CHINA; VITAMIN D deficiency; DISEASE prevalence; PREGNANCY complications; LOGISTIC regression analysis; CHINESE people; VITAMIN deficiency; DISEASES; AGE distribution; ETHNIC groups; SUNSHINE; BODY mass index; CROSS-sectional method
- Publication
Public Health Nutrition, 2017, Vol 20, Issue 10, p1746
- ISSN
1368-9800
- Publication type
journal article
- DOI
10.1017/S1368980015002980