With plasma G2 levels ≥ 7.8 mmol: ROC-UAC of FINDRISC was 61.2%, the optimal cut points: 12 (Se = 32.7%; 1-Sp = 7.4%); with plasma G2 concentration ≥ 11.1 mmol: ROC-AUC of FINDRISC was 89.3%, the optimal cut point of 13 (Se = 90% 1-Sp = 22.3%).