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Association of 25-hydroxyvitamin D with Hb and lead in children: a Chinese population-based study

  • Li Chang (a1), Xiaojuan Liu (a1), Hua Shi (a1), Wei Dai (a1), Hong Wang (a1) and Yongmei Jiang (a1)...

Abstract

Objective

To evaluate the prevalence of vitamin D deficiency and insufficiency, as well as their association with Hb and elevated blood lead levels (BLL) in children in China.

Design

A cross-sectional and 1-year retrospective study.

Setting

Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, China.

Subjects

Children aged from 6 months to 14 years living in south-west China who were taken to physical examinations (January–December 2011).

Results

Of 1218 children included in the study, 25-hydroxyvitamin D (25(OH)D) concentration (mean 33·18 (sd 16·48) ng/ml) was deficient in 21·6 % and insufficient in 27·4 %, which were higher than the prevalence of both anaemia at 8·5 % and elevated BLL (Pb ≥ 10 μg/dl) at 1·8 %, but lower than mildly elevated BLL prevalence (5 μg/dl ≤ Pb < 10 μg/dl) at 56·9 %. There was a negative correlation between 25(OH)D concentration and BLL (r = −0·216, P < 0·001) while no significant relationship was found between 25(OH)D concentration and Hb (r = −0·012, P > 0·05). After multivariable adjustment, the significant predictors of 25(OH)D deficiency and insufficiency were increasing child age especially between 8 and 14 years (OR = 18·29; 95 % CI 10·14, 32·99; P < 0·001) and BLL (OR = 1·01; 95 % CI 1·00, 1·02; P = 0·045).

Conclusions

The prevalence of 25(OH)D deficiency and insufficiency was much higher than that of anaemia or elevated BLL in south-west China, and associated with increasing age and BLL.

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Copyright

Corresponding author

*Corresponding author: Email huaxi2jianyan@163.com

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