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(a) ROC curve of OPG for all-cause mortality (AUC 0.72, CI 95%: 0.627–0.821), cut-off point for OPG = 14.37 pmol/L, p < 0.001; with 72.4% sensitivity and a specificity of 62.5%. (b) ROC curve of OPG for CV mortality (AUC: 0.70; CI 95%: 0.552–0.845), cut-off point for OPG = 13.57 pmol/L, p < 0.011, with a sensitivity of 77.3% and a specificity of 64.8%.
