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

Sci Rep · 2019 · PMC6928152 · PMID 31873182

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an increasing trendno p-value reported

In China, serum 25(OH)D level decreased by age and was significantly higher in males (p < 0.0001), while in the US, we saw an increasing trend with age and was significantly higher in females (p < 0.0001).

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