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

True or False: Case-control studies use a strategy that identifies health outcome status initially and then determines exposures of the study population.TrueFalse

When is a case-control study design typically used in epidemiological research?Select one alternative:When researchers know the exposure but not who is sick or healthy.When researchers know who is sick and who is healthy, but do not know the exposure.When researchers know both the exposure and the health status of individuals.When researchers randomly assign participants to control and experimental groups.

True or False: Case-control studies can directly measure the risk or rate of a health outcome?TrueFalse

When should a researcher consider using a case-control study? Select all that apply. When exposure data are expensive or difficult to obtain When the disease is well-understood When the disease has a long induction and latent period When the disease is common

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.