我国中年人群血清TC/HDL-C比值与缺血性和出血性脑卒中发病危险性

Serum TC/HDL-C ratio and the risk of ischemic and hemorrhagic stroke incidence in middle aged Chinese population

目的探讨我国中年人群TC/HDL C比值对缺血性和出血性脑卒中发病的预测作用。方法采用前瞻性队列研究方法,在中美心血管病和心肺疾病流行病学合作研究4组队列人群(北京、广州两地工人和农民)中选择基线年龄35～59岁、无心肌梗死和脑卒中病史且资料完整者10121名为研究对象(男性4921名,女性5200名),平均随访15.9年。结果随访期间共发生缺血性脑卒中277例,出血性脑卒中125例。将TC/HDL C比值分为<3.0、3.0～、3.5～、4.0～和≥4.5五组,缺血性脑卒中年龄调整发病率(1/10万人年)依次为144.1、169.4、166.7、226.9和282.2,比值≥4.0增高明显;Cox回归分析显示,调整年龄、性别、地区以及舒张压、血糖、吸烟和饮酒等变量后,TC/HDL- C比值4.0～及≥4.5组,缺血性脑卒中发病相对危险性显著高于参照组(TC/HDL-C<3.0),RR分别为1.59(1.06～2.38)和1.87(1.30～2.68);TC/HDL-C比值、TC、LDL-C对缺血性脑卒中均有独立预测作用,TC/HDL-C比值五分位与缺血性脑卒中发病相对危险性关联曲线呈线性,而TC和LDL C五分位相应关联曲线呈“J”形。TC/HDL-C水平与出血性脑卒中未见明显关联趋势。结论血清TC/HDL-C比值对我国中年人群缺血性脑卒中发病有独立的预测作用,且预测能力可能优于TC或LDL-C。

ObjectiveTo explore the predictive effect of serum TC/HDL-C ratio on ischemic and hemorrhagic stroke incidence in middle aged Chinese population.MethodsA prospective study was conducted based on the PRC-USA Collaborative Study on Cardiovascular and Cardiopulmonary Epidemiology. A total of 10 121 individuals (4921 men and 5200 women), aged 35—59 years were selected from 4 cohorts, in Beijing and Guangzhou, urban and rural. The average following up time was 15.9 years. During the follow-up period, 277 ischemic and 125 hemorrhagic stroke cases were diagnosed.ResultsThe age adjusted incidence rate of ischemic stroke was 144.1,169.4,166.7,226.9 and 282.2 in the group of TC/HDL-C ratio <3.0, 3.0—, 3.5—, 4.0—,and ≥4.5 respectively, was elevated markedly in the group of TC/HDL-C 4.0— and ≥4.5. Cox regression analyses indicated that with adjusting age, sex, site, diastolic blood pressure, blood glucose cigarette smoking and alcohol intaking, the relative risk of ischemic stroke incidence was significantly higher in the group of TC/HDL-C 4.0— and ≥4.5 as compared to the reference group (TC/HDL-C <3.0), RR was 1.59 (1.06—2.38) and 1.87 (1.30—2.68). The relative risk of ischemic stroke was linearly related to the quintile of TC/HDL-C, but the curve of association for TC and LDL-C was “J” shape. No significant association was observed for hemorrhagic stroke.ConclusionTC/HDL-C ratio is an independent predictor for ischemic stroke in Chinese middle aged population and may have better ability of prediction than TC or LDL-C.