Table 2.

CVPE and RMSE estimates of error calculated from calibration analysis of surrogate indexes of insulin sensitivity/resistance adjusted for weight

	CVPE	P Value	RMSE	P Value
QUICKI	5.86		5.80
Log (HOMA)	5.88	0.39	5.81	0.44
HOMA	5.96	0.29	5.88	0.29
1/HOMA	5.80	0.50	5.79	0.44
1/Fasting insulin	5.80	0.44	5.79	0.45

CVPE, leave-one-out cross-validation-type root mean squared error of prediction; RMSE, square root of the mean squared error of prediction. These error estimates are derived from comparing observed GIR from glucose clamp studies with predicted GIR derived from calibration analysis of surrogate indexes, as described in methods (n = 80). P values are for statistical comparisons between CVPE or RMSE for QUICKI adjusted for weight and respective error estimates from alternative surrogate indexes adjusted for weight.