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Chinese Journal of School Health ; 43(11):1638-1641, 2022.
Article in Chinese | Scopus | ID: covidwho-2286191


Objective To investigate the nutritional status and associated factors of vitamin D among children aged 0 to 12 years old in Chongqing. Methods From January 2019 to December 2021 1 877 children aged 0-6 years who received regular child health care were randomly selected from Chongqing maternal and child health hospital and 707 school-age children were also selected from three primary school in Chongqing for investigation. The serum sample were collected for detecting serum 25- OH -D level by chemiluminescence method and the possible influencing factors of vitamin D deficiency VDD were analyzed. Results The average serum 25- OH -D concentration of children was 39.9±9.1 ng/mL with the positive rate of VDD was 14.59%. There were significant differences of VDD positive rate in different age visiting time visiting season body shape outdoor activity time and vitamin D supplementation 0-3 years old vs 4-6 years old vs 7-12 years old 14.73% vs 22.19% vs 10.47% visiting season spring vs summer vs autumn vs winter 12.97% vs 10.65% vs 14.86% vs 21.33% pre COVID-19 epidemic vs post COVID-19 epidemic 11.18% vs 17.08% underweight or normal vs overweight or obesity 12.34% vs 26.13% adequate outdoor activity time vs inadequate 11.84% vs 16.27% regular vitamin D supplementation vs irregular vitamin D supplementation 11.71% vs 15.62% χ2 = 26.17 17.59 30.98 53.74 9.60 6.17 P<0.05. Underweight or normal body weight sufficient outdoor activities and regular vitamin D supplementation were associated with less vitamin D deficiency with OR OR95%CI at 0.68 0.55-0.84 0.57 0.25-0.77 and 0.62 0.44-0.85 P<0.05. Conclusion The prevalence of VDD among preschool and school-age children is high in Chongqing. Integrated prevention and control strategies incluing overweight or obesity control increasing outdoor activities and oral vitamin D supplements should be taken. © 2022 Authors. All rights reserved.