Receiver operating characteristic curve showed that the model comprising of baseline fasting plasma glucose ( FPG ) and GGT ( area-under-curve ( AUC ) [ 95 % CI ] : 0.668 [ 0.613-0 .722 ] ; P < 0.0001 ) was equally sensitive in identifying subjects with risk of diabetes as compared to 2 hr PG ( AUC [ 95 % CI ] : 0.670 [ 0.614-0 .725 ] ; P < 0.0001 ) and HbA1c ( AUC [ 95 % CI ] : 0.677 [ 0.619-0 .734 ] ; P < 0.0001 ) alone .