Select the correct statement. A retrospective cohort study....Question 3Select one:a.is the same as a case-control study as they are different names for the same retrospective study design.b.goes back in time to establish the cohort and follows them up in the present.c.divides participants based on outcome and then establishes exposure.d.is also called a nested case-control study.

Question 8Answera.Case-controlb.Retrospective cohortc.Prospective cohortd.Cross-sectional

Select the correct definition of a cohort study: Question 2Select one:a.Cohort studies start with people who do or do not have a disease and examine their past for particular exposures.b.Cohort studies start with people who are free of disease, classify them based on exposure, and follow them to measure an outcome.c.Cohort studies measure exposures and outcomes at the same time.d.Cohort studies assign people to receive an exposure or to be a control and follow them forward in time to assess outcome development.

When is the cohort formed for a Retrospective Study? In the past Today In the future

Case control studies are:Question 4Select one:a.Always at risk of attrition biasb.Always retrospective and observationalc.Always considered to be experimental by designd.Always prospective, with the investigator looking forward in time

A case studyQuestion 15Answera.all of the these.b.is an intensive study of a single individual or group.c.is a form of observational research.d.cannot be used to test a causal hypothesis.