西北地区脑卒中发病季节的圆形分布法分析兰州军区总医院神内科杨金升，吴志英，卢世礼脑血管病是一组发生在中老年人群的疾病，除了人群Ｌ的特征及诸多的发病危险因素之外，它的发生还与诸多的环境因素有关，本文应用圆形分布分析法·就西北五省区脑卒中的季节性特征进行... The circular distribution method analysis of stroke incidence season in northwest China Lanzhou Military Region General Hospital Department of Neurology Yang Jinsheng, Wu Zhiying, Lu Shili Cerebrovascular disease is a group of diseases that occur in the middle-aged and elderly people, in addition to the characteristics of population L and many risk factors. The occurrence of it is also related to many environmental factors. This paper applies the circular distribution analysis method to analyze the seasonal characteristics of stroke in the five provinces of Northwest China.