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A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States.

Publication ,  Journal Article
Wei, J; Zhu, A; Ji, JS
Published in: Scientific reports
December 2019

Vitamin D deficiency is a common health concern worldwide. We aim to compare the prevalence of vitamin D deficiency among older adults (65+) in China and the United States (US). We used data from the 2011 wave of Chinese Longitudinal Healthy Longevity Survey (CLHLS) in China (n = 2180), and 2011-2014 National Health and Nutrition Examination Survey (NHANES) in the US (n = 2283). Serum 25-hydroxyvitamin D [25(OH)D] was measured and a level of under 30/50 nmol/L was defined as vitamin D severe deficiency/deficiency. Risk factors of vitamin D deficiency were examined by multivariate regression models. We found that the mean 25(OH)D concentration was lower in China than in the US (45.1 vs. 83.5 nmol/L), with Chinese elderly lower than American elderly for every age group. 70.3% in China and 17.4% in the US were considered as vitamin D deficiency (30.6% and 3.4% were considered as severe deficiency). Older age, females, ethnic minorities, higher household income, self-rated "very bad" health, and never drinkers, were statistically significant in predicting lower serum 25(OH)D levels in China. In the US, males, ethnic minorities, lower income, self-rated "very bad" health, physically inactive, overweight, and obese were related to lower serum 25(OH)D levels. Our findings suggest that different interventional strategies are needed to improve vitamin D deficiency and its associated negative health outcomes in China and the US.

Duke Scholars

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Published In

Scientific reports

DOI

EISSN

2045-2322

ISSN

2045-2322

Publication Date

December 2019

Volume

9

Issue

1

Start / End Page

19713

Related Subject Headings

  • Vitamin D Deficiency
  • Vitamin D
  • United States
  • Nutrition Surveys
  • Male
  • Longitudinal Studies
  • Longevity
  • Linear Models
  • Humans
  • Female
 

Citation

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Wei, J., Zhu, A., & Ji, J. S. (2019). A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States. Scientific Reports, 9(1), 19713. https://doi.org/10.1038/s41598-019-56297-y
Wei, Jia, Anna Zhu, and John S. Ji. “A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States.Scientific Reports 9, no. 1 (December 2019): 19713. https://doi.org/10.1038/s41598-019-56297-y.
Wei J, Zhu A, Ji JS. A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States. Scientific reports. 2019 Dec;9(1):19713.
Wei, Jia, et al. “A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States.Scientific Reports, vol. 9, no. 1, Dec. 2019, p. 19713. Epmc, doi:10.1038/s41598-019-56297-y.
Wei J, Zhu A, Ji JS. A Comparison Study of Vitamin D Deficiency among Older Adults in China and the United States. Scientific reports. 2019 Dec;9(1):19713.

Published In

Scientific reports

DOI

EISSN

2045-2322

ISSN

2045-2322

Publication Date

December 2019

Volume

9

Issue

1

Start / End Page

19713

Related Subject Headings

  • Vitamin D Deficiency
  • Vitamin D
  • United States
  • Nutrition Surveys
  • Male
  • Longitudinal Studies
  • Longevity
  • Linear Models
  • Humans
  • Female