SVM loop-level flexibility prediction accuracy for various levels of confidence cutoffs. The AUC of random prediction is 0.5. The AUC is 0.79 with default cutoff of 0.5. Average ROC curves with confidence cutoffs at 0.6 with 154 loops, 0.7 with 126 loops, and 0.8 with 64 loops are also shown, and they correspond to AUC of 0.80, 0.81, and 0.83 respectively.