Abstract: Objective To evaluate the impact of smoking for the population’s life span and the relationship between smoking and the incidence or subtypes of stroke.Methods The community with population of 20 000 was selected in Beijing City, from which 5441 (age≥35 years) people were surveyed after random cluster sampling. Then the second cross-sectional survey after 10 years was finished.Results The incidence of stroke in 5441 people was 668.15/100 000 person-years. In accordance with the morbidity of stroke during three groups of total stroke, ischemic stroke and hemorrhagic stroke the order was: smoking group(798.56/100 000 person-years )> quit smoking group(754.71/100000 person-years)>no smoking group(591.38/100 000 person-years), respectively, and showing that the impact of smoking for ischemic stroke and total stroke were more clear. Smoking group survival curve decreased significantly.Conclusion Smoking has constituted the independent risk factors for stroke. Smoking can increase the incidence of stroke as well as reduce the population survival curve and affect the life expectancy. In addition, the old and middle-aged people were high-risk groups which prone to stroke so that they could benefit from smoke-quitting .

Key words: Middle aged; Aged; Stroke; Incidence; Risk factor; Smoking

摘要： 目的 探讨北京城区中老年人群吸烟与卒中发病率及卒中类型的关系，以及吸烟对于群体生存时间的影响。方法 选择北京城区2万自然社区人群，随机整群抽样调查5441例（年龄≥35岁），限于人群随访困难，仅进行间隔10年的两次横断面调查。应用COX比例风险模型分析吸烟与卒中的发病及生存预后的相关性。结果 随访人群卒中发病率高达668.15/10万人年。总卒中发病率排序为：吸烟组（798.56/10万人年）＞戒烟组（754.71/10万人年）＞非吸烟组（591.38/10万人年），组间差异有统计学意义。吸烟与缺血性卒中和总卒中发生的相关性具有统计学意义。吸烟组生存时间明显降低。结论 吸烟已构成卒中独立的危险因素，吸烟人群卒中的发病率高于非吸烟人群，群体生存曲线降低，影响到群体的生存寿命；此外，中老年人群既是卒中的高危人群，也可能是戒烟的最大受益群体。

关键词: 中年人; 老年人; 卒中; 发病率; 危险因素; 吸烟