1. Serum 25 hydroxyvitamin D status in 6‐month‐old infants in Guangzhou, China: A paired longitudinal follow up study.
- Author
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Wang, Jing, Zhang, Joy Yue, Wei, Ru, Hu, Shunping, Lin, Tao, Lash, Gendie E., and Tan, Meizhen
- Subjects
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AGE distribution , *ANTHROPOMETRY , *CONFIDENCE intervals , *STATISTICAL correlation , *DIETARY supplements , *ENZYME-linked immunosorbent assay , *INFANT nutrition , *INTERVIEWING , *LONGITUDINAL method , *MOTHERS , *PARENTS , *PHYSICAL diagnosis , *QUESTIONNAIRES , *REGRESSION analysis , *RESEARCH funding , *SERUM , *STATISTICAL hypothesis testing , *STATISTICS , *T-test (Statistics) , *VITAMIN D , *DATA analysis , *EDUCATIONAL attainment , *DATA analysis software , *STATISTICAL models , *DESCRIPTIVE statistics , *CORDOCENTESIS , *ONE-way analysis of variance , *CHILDREN - Abstract
To assess the vitamin D status in healthy 6‐month‐old infants, as well as vitamin D supplementation and feeding patterns in Guangzhou, China, serum 25‐hydroxyvitamin D (25OHD) concentrations of 202 infants were measured at birth (cord blood) and at 6 months of age in Guangzhou, China. Questionnaires acquiring demographic characteristics, maternal and infantile vitamin D supplementation during pregnancy and first 6 months after birth, and feeding patterns during the first 6 months were completed by participating mothers. Physical examinations and blood sampling were carried out among infants at 6 months of age. The majority of infants (93.6%) were supplemented with vitamin D during the first 6 months of life on a voluntary basis. The M ± SD of cord serum 25OHD concentration was 46.2 ± 16.4 nmol/L, whereas the M ± SD of 25OHD concentration at 6 months was 82.9 ± 24.9 nmol/L. Serum 25OHD concentrations <30 nmol/L were seen in 34 (16.8%) infants at birth but only one (0.5%) at 6 months. Only 11 (5.4%) infants had concentrations >75 nmol/L at birth, whereas the majority of infants (n = 131, 64.9%) had concentrations >75 nmol/L at 6 months. The main predictors of 25OHD levels at 6 months included season, vitamin D supplementation, parental education level, and feeding patterns. To conclude, serum 25OHD concentrations were low at birth in a southern Chinese population, and infantile supplementation is an effective way to improve 25OHD status. Exclusively breastfed infants might need greater vitamin D supplementation, and individualized vitamin D supplementation plans might be needed. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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