Vitamin D insufficiency and deficiency is pandemic in the world.Sichuan Basin has a subtropical monsoon climate with China's lowest sunshine totals. Inferably, the prevalence of vitamin D insufficiency/deficiency in Sichuan basin is high, and possibly the highest in China. This study will research the serum 25OHD level to get the prevalence of vitamin D deficiency and insufficiency of urban and rural residents in Sichuan Province, China.
Study Type
OBSERVATIONAL
Enrollment
1,500
West China hospital, Sicuhuan University
Chengdu, Sichuan, China
Serum 25OHD
It is a cross-sectional study. All measurements will be performed once after subjects are enrolled.
Time frame: 0 day.
serum calcium and phosphate, creatinine, PTH, BALP and CTX
It is a cross-sectional study. All measurements will be performed once after subjects are enrolled.
Time frame: 0 day
Bone mineral density of lumbar spine and hip
It is a cross-sectional study. All measurements will be performed once after subjects are enrolled.
Time frame: 0 day.
Short physical performance battery
It is a cross-sectional study. All measurements will be performed once after subjects are enrolled.
Time frame: 0 day.
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