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Fig. 1 | BMC Cancer

Fig. 1

From: Endometriosis as a risk factor for ovarian or endometrial cancer — results of a hospital-based case–control study

Fig. 1

Observed and predicted frequencies of ovarian or endometrial cancer cases. The patients were ranked according to the predicted conditional probability of being a case by the logistic regression model, and grouped into 10 categories based on deciles. Numbers of observed cancer cases in each category (“observed events”) are plotted against the summed-up predicted probabilities of being a case in each category (“predicted events”). Points below the gray line indicate when the regression model overestimates the cancer risk, and points above it indicate underestimation. A perfect prediction model would have all points on the gray line

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