摘要: Population is the entire collection of units from which a sample may be drawn ,includesfinite populat[阅读全文:]
摘要: Molecular epidemiology is a branch of epidemiology.It combines theories and methods in both epidemiol[阅读全文:]
摘要: Case Control StudiesCohort StudyAdvantagesThey are quicker and inexpensive to conductIt[阅读全文:]
摘要: AR is a very important and commom measure for the effect of the exposure.It is the difference of the[阅读全文:]
摘要: RR is the most common measure for the association between esposure and outcome.The meaning is how man[阅读全文:]
摘要: OR is a very useful measure for the association between exposure and outcome.It is the ratio of the o[阅读全文:]
摘要: Matching is defined as the process of making a study group and a comparison group comparable with res[阅读全文:]
摘要: Case-control studies start with the identification of people with the disease of interst and a contro[阅读全文:]
摘要: Screening is the early detection and presumptive identification of an unrecognized disease or deficit[阅读全文:]
摘要: Confounding variable is an extraneous factor that relates(positively or negatively)with both the outc[阅读全文:]
