In a study begun in 1965 a group of 3000 adults in

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5. In a study begun in 1965, a group of 3,000 adults in Baltimore were asked about alcohol consumption. The occurrence of cases of cancer between 1981 and 1995 was studied in this group. This is an example of: a) A cross-sectional study b) A prospective cohort study c) A retrospective cohort study d) A clinical trial e) A case-control study
6. In a small pilot study, 12 women with endometrial cancer (cancer of the uterus) and 12 women with no apparent disease were contacted and asked whether they have ever used estrogen. Each woman with cancer was matched by age, race, weight, and parity to a woman without disease. What kind of study design is this?
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7. In a case-control study, which of the following is true? d

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