CH&E 4010 Lecture Notes - Lecture 11: Relative Risk, Retrospective Cohort Study, American Chemistry Council
12 May 2021
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Ch&e 4010 lecture 11 february 22, 2021 calculating relative risk. Incidence is a measure of risk of disease. Relative risk: relative risk: the ratio of the risk of disease in exposed individuals to unexposed individuals. No, relative risk should not be calculated in a case-control study because there is no measure of risk (or that we do not know the incidence). Of 2,872 persons who had received radiation treatment in childhood because of an enlarged thymus, cancer of the thyroid developed in. 24 and a benign thyroid tumor developed in 52. A comparison group consisted of 5,055 children who had received no such treatment (brothers and sisters of the children who had received radiation treatment). During the follow-up period, none of the comparison group developed thyroid cancer, but benign thyroid tumors developed in six: calculate the relative risk for benign thyroid tumors. We cannot determine the relative risk for the youngest age group without the incidence from both groups.
