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在医学科学研究和卫生事业管理工作中,对疾病率(患病率或新发病率)的调查分析具有十分重要的意义。疾病在不同的时间或地区中的频率分布,是制订卫生工作计划、考查防治效果和研究病因——流行病学的依据。
In the medical science research and health management work, the investigation of the disease rate (prevalence or new incidence) is of great significance. The frequency distribution of diseases at different times or regions is the basis for formulating health work plans, examining the effects of prevention and treatment and studying etiology-epidemiology.