Figure 4. ROC curves for urinary AG31 levels in the detection of NMIBC patients. (A) ROC curves for patients with NMIBC versus the controls in the test groups. (B) ROC curves for patients with NMIBC versus the controls in the validation groups. Jagged curves denote ROC curves; diagonal lines represent reference lines. HC, healthy control; NMIBC, non-muscle-invasive bladder cancer.