Fig. 1. ROC curves for models predicting NSSI < or ≥ 5 in the last year.

The blue line is the smoothed average of the ROC curves over all folds, the gray band covers 80% of the sensitivity values across all folds at each level of specificity. The dashed diagonal line corresponds to a useless predictor (chance). The more above and to the left of the diagonal, the better the predictor.