The positive effects of TGC on postoperative complications were driven by nondiabetic subjects ( 21.3 % vs 33.7 % , 95 % CI , 0.54-0 .74 ; blood glucose 6.5 0.6 vs 6.6 0.8 mmol/L , not significant ; time in target range , 40.8 % 13.6 % vs 39.7 % 13.8 % , not significant ) , whereas no significant effect was seen in diabetic patients ( 29.4 % vs 35.1 % , 95 % CI , 0.66-1 .06 ) despite significantly better glucose control in the perioperative group ( blood glucose , 6.9 1.0 vs 7.1 0.8 mmol/L , P < .001 ; time in target range , 34.3 % 12.7 % vs 30.8 % 11.5 % , P < .001 ) .