Figure 1From: Predicting complete loss to follow-up after a health-education program: number of absences and face-to-face contact with a researcher ROC curves for two predictors of complete loss to follow-up. One predictor is the number of absences (area under the curve = 0.72), and the other is a logistic regression model with four independent variables (number of absences, age, face-to-face contact with a researcher, and connective tissue disease; area under the curve = 0.77).Back to article page