摘要: Observational study is a kind of epidemiology.We observe and measure the occurrence of the disease or[阅读全文:]
摘要: Bias is a systematic error ,it exsits in the design ,conduct or analysis of a study and it may result[阅读全文:]
摘要: Cross-sectional study is a type of descriptive study,is also called prevalence study.It is an investi[阅读全文:]
摘要: Prevalence measures the rate of occurrence of both new and ongoing cases of diseases in a given popul[阅读全文:]
摘要: ncidence measures the rate of occurrence of new cases of disease in a given population in a given tim[阅读全文:]
摘要: PYLL is measure of the socio-economic impact of the premature death of an individual.It is measured b[阅读全文:]
摘要: Primary prevention concentrates on the cause prevention or reduction of risk factors,so as to prevent[阅读全文:]
摘要: Experimental epidemiology is to identify a group of subjects with the same conditions,and randomizes[阅读全文:]
摘要: Ecological study is a type of descriptive study.It is the study of the relationship between some fact[阅读全文:]
摘要: Descriptive epidemiology is concerned with the variations of morbidity and mortality in a community.I[阅读全文:]
