![Observational research methods. Research design II: cohort, cross sectional, and case-control studies | Emergency Medicine Journal Observational research methods. Research design II: cohort, cross sectional, and case-control studies | Emergency Medicine Journal](https://emj.bmj.com/content/emermed/20/1/54/F3.large.jpg)
Observational research methods. Research design II: cohort, cross sectional, and case-control studies | Emergency Medicine Journal
![The difference between a retrospective cohort study and a prospective cohort study. | Cohort study, Case control study, Cross sectional study The difference between a retrospective cohort study and a prospective cohort study. | Cohort study, Case control study, Cross sectional study](https://i.pinimg.com/originals/cb/e6/ec/cbe6ecf677c7bc7f50c58dde93dc0f11.jpg)
The difference between a retrospective cohort study and a prospective cohort study. | Cohort study, Case control study, Cross sectional study
![Prospective Cohort Designs Provide Measures of Incidence and Relative Risk - Accredited Professional Statistician For Hire Prospective Cohort Designs Provide Measures of Incidence and Relative Risk - Accredited Professional Statistician For Hire](https://www.scalestatistics.com/uploads/3/0/4/1/30413390/7911979_orig.jpg)
Prospective Cohort Designs Provide Measures of Incidence and Relative Risk - Accredited Professional Statistician For Hire
![The differences between a case control study and a cohort study. | Case control study, Cohort study, Essential oil remedy The differences between a case control study and a cohort study. | Case control study, Cohort study, Essential oil remedy](https://i.pinimg.com/originals/30/92/a2/3092a25a1a9ba074bc5c7f443cf91f62.jpg)