Click on the links below to view different characteristics of Epiville. Then, click on the various situations to view various selection procedures and their effects. View: Income Smoking Insurance All Select controls and cases for: Situation 1 Situation 2 Situation 3

Situation 2: Epiville General Hospital cases come from different areas, including outside Epiville. (As you many recall, Epiville General is a tertiary care facility and people from many areas come to see its specialists.) Controls selected from the admissions office with diagnoses of cancer other than cancer under study and not related to our exposure or with diagnoses of noncancer diseases.