C statistic, sensitivity, specificity, Youden index and likelihood ratios of the optimal cut-off value for the risk of diabetes in each model for Eastern Asians in the 6-year follow-up cohort in Beijing and Shanghai, China, 2005–2011.

Abbreviations: LR+, likelihood ratio for a positive test results; LR-, likelihood ratio for a negative test results. Higher discrimination C statistics was well as lower Brier scores indicated better performance. aC-statistic was significantly lower (P<0.05) when compared to the current study.