Alternative Analytic Methods for Case-Control Studies of Estrogens and Endometrial Cancer

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Abstract
In a case–control study of estrogens and endometrial cancer, alternative sampling methods were used to eliminate the detection bias that arises from the increased diagnostic attention received by women with uterine bleeding after estrogen exposure. In a set of cases and controls chosen by conventional procedures the odds ratio was 11.98. In an alternative set of cases and controls at the same institution, consisting of patients who had all received dilatation and curettage or hysterectomy because of uterine bleeding, the odds ratio was 1.7.

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