我国部分地区成人血浆维生素B_(12)水平比较研究

目的:描述不同地区、季节、性别成年人血浆维生素B12水平的分布特征。方法:描述性流行病学研究;以来自南北方有代表性的城乡地区2 459份血浆标本(35～64岁)进行维生素B12检测并比较其地区、季节及性别差异。结果:南方人群调整后血浆维生素B12平均水平为260pmol/L,显著高于北方人群(189pmol/L);南北方人群血浆维生素B12水平随季节变化规律不同,南方人群夏秋季节(269pmol/L)血浆维生素B12水平高于冬春季节(252pmol/L),北方人群则夏秋季节(177pmol/L)明显低于冬春季节(200pmol/L);女性调整后血浆维生素B12水平高于男性,差异具有统计学意义。全研究人群中血浆维生素B12低于110pmol/L者占5.5%。结论:我国成年人群血浆维生素B12水平存在明显的地区和性别差异;南北方人群血浆维生素B12水平随季节变化的规律不同。

STUDY OF PLASMA VITAMIN B12 CONCENTRATION IN CHINESE ADULTS

Objective: To describe the distribution of plasma vitamin B12 concentration in Chinese adults aged 35 to 64 years.Methods:Cross-sectional analysis was empolyed.Plasma vitamin B12 concentration was measured in 2 459 adults sampled from the representative urban and rural areas in the South and North of China.Results:Adjusted plasma vitamin B12 concentration was significantly higher (260 pmol/L) in the Southerners than in the Northerners (189 pmol/L).There were different patterns of seasonal changes of plasma vitamin B12 concentration between South and North.Plasma vitamin B12 concenration was higher during the summer and autumn (269 pmol/L)than during the winter and spring (252 pmol/L) in the South.However,the concentration was lower during the summer and autumn (177 pmol/L) than during the winter and spring (200 pmol/L) in the North.Women tended to have higher plasma vitamin B12 concentration than men.There were 5.5 percent of the participants whose plasma vitamin B12 concentration was lower than 110 mol/L.Conclusion:Significant regional and gender differences in plasma vitamin B12 concentration were observed in Chinese adults.The seasonal changes between the South and North were different.