1. Natural history of infants with vitamin D deficiency in Hong Kong.
- Author
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Yuet-Ling Tung, Joanna, Hung-Kwan So, Tsz-Suen Tung, Keith, Sze-Man Wong, Rosa, Hing-Wai Tsang, Bianca Chan, Wan-Yee Tso, Winnie, Chi-Kei Wong, Ian, Cheuk-Sing Yam, Jason, Lai-Ka Lee, Samantha, Pang, Gloria, Hing-Sang Wong, Wilfred, Ka-Wang Cheung, Wing-Cheong Leung, and Ip, Patrick
- Subjects
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VITAMIN D deficiency , *NATURAL history , *BREASTFEEDING , *INFANTS , *VITAMIN D , *DIETARY supplements - Abstract
Background and Objectives: The usual recommended intake of vitamin D for healthy infants is 400 international unit (IU) daily. However, a high dose of vitamin D at 2000-3000 IU daily is needed for those with vitamin D deficiency (VDD). This study aimed to assess the natural history of a group of healthy infants with VDD and the associated factors for persistent VDD. Methods and Study Design: Healthy infants detected to have VDD (25OHD <25 nmol/L) in a population study were followed, and their demographics and clinical data were collected. Results: One hundred and thirty-one subjects (boys = 66%) were included. Their first serum 25OHD was taken at a median age of 87.5 days. None were treated with high-dose vitamin D supplements, but some have been given vitamin D at 400 IU daily. They were assessed again at the median age of 252.5 days when 15 remained to have VDD and 26 were in the insufficient range (25 - 49.9nmol/L). All persistent VDD children were on exclusive breastfeeding. Exclusive breastfeeding and no vitamin D supplementation were significant risk factors for persistent vitamin D insufficiency (<50nmol/L). Conclusions: Persistent VDD is common among infants exclusively breastfeeding and those who did not receive vitamin D supplementation. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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