北京城乡人群1168例血浆同型半胱氨酸分布及相关因素研究

目的：描述北京地区人群血浆同型半胱氨酸（Hcy）水平分布及特点，分析Hcy与相关因素的关系。方法：以北京地区城乡人群35－64岁男女两性1168人的调查结果为研究样本，对血浆同型半胱氨酸分布特点及与相关因素的关系进行统计学分析。结果：①血浆Hcy几何均数男性为15．4μmol/L，女性为12．2μmol/L，男性高于女性（P＜0．001）。②血浆Hcy分布存在着城乡差别，农村男性（18．0μmol/L）是城市男性（12．0μmol/L）的1．5倍（P＜0．001），农村女性（12．9μmol/L）是城市女性（9．6μmol/L的1．3倍（P＜0．001）。③北京城乡35－64岁人群中高Hcy血症（Hcy≥16μmol/L）的患病率为15．3％。④与相关因素分析显示：城乡、性别、受教育水平和吸烟是高同型半胱氨酸血症 的影响因素。结论：北京地区人群血浆同型半胱氨酸水平的分布存在着年龄、性别和城乡间差别；北京地区人群Hcy水平及高Hcy血症的患病率明显高于西方发达国家，尤其是农村地区；城乡间Hcy水平的差别可能更大程度地反映了环境因素的影响。

The distribution of serum homocysteine and its associated factors in a population of 1 168 subjects in Beijing area

OBJECTIVE: To describe serum homocysteine distribution and its associated factors in population of urban and rural areas in Beijing. METHODS: The study population was represented by a randomly selected sample with 1 168 subjects, including both males and females aged 35 - 64. The levels of serum homocycteine were compared and the correlation with other risk factors were analyzed statistically. RESULTS: (1) Geometric mean of serum homocycteine was 15.4 micromol/L in males and 12.2 micromol/L in females (P < 0.001). (2) There was a significant difference in homocysteine levels between urban population and rural population. Men from rural area had 1.5 times higher homocyteine than from urban (18.0 micromol/L vs 12.0 micromol/L, P < 0.001), while the rural women had 1.3 times higher homocysteine level than urban women did. (3) The prevalence rate of hyperhomocysteinemia was 15.3% in population aged 35 - 64 in Beijing area. (4) Gender, residential location (urban or rural), smoking and education had independent effects on level of serum homocysteine by multivariate analysis. CONCLUSION: Population in Beijing had higher serum level and prevalence rate of homocysteine than some western countries. Gender, geographic distribution, smoking and education had some influence on homocysteine level.