True or False: A cohort study is the best method for associating cause and effect when exposure or treatment cannot be controlled by the investigator but when we want to be certain that exposure preceded the health outcome.True False

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

Cohort studies allow true determination of incidence of an outcome.Question 2Select one:TrueFalse

True or false: In a cross-sectional study we cannot determine whether exposure precedes the health outcome.TrueFalse

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.

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