文档介绍：1
疾病的分布
Distribution of Disease
What is Distribution of Disease ☆ When ☆ Where ☆ Who
INTRODUCTION
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疾病的分布是指疾病的人群现象
是描述疾病事件(发病、患病、死亡等)
Time (时间)
Place (空间)
Person(人间)
在流行病学中简称“三间分布”
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Example
You have been asked to investigate an event in which 2,220 people were exposed and 1,520 of them died.
Your role as an epidemiologist is to ask questions about person, place and time.
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How do we ask questions? Surveys -of survivors --of other related persons
Example
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Objectives
第一节疾病频率测量指标
第二节疾病流行强度
第三节疾病分布形式
Frequency of Disease Measurement
Intensity of Epidemic
Dimension distributions
of disease
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Directions:
This chapter describes the basic measures of disease frequency used in epidemiologic research
Frequency of Disease Measurement
第一节疾病频率测量指标
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发病频率测量指标
患病频率测量指标
死亡频率测量指标
预期寿命及相关指标
Morbidity frequency measures
Prevalence related measures
Mortality frequency measures
Life expectancy related measures
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一、发病指标
发病率(incidence)
罹患率(attack rate)
续发率(secondary attack rate)
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发病率(incidence)
定义
在一定期间内,一定人群中某病新发生的病例出现的频率。
Definition
the rate of new cases of a disease in a specified population over a defined period
发病率= —————————————————×K
K=100%,1000/千,或10000/万
一定期间内某人群中某病新病例数
同时期暴露人口数