Table 3.

Best threshold, sensitivities, specificities and areas under the time-dependent receiver operating characteristic curves for BMI, WC and WHtR predicting future diabetes risk.

		BMI				WC				WHtR
	Diabetes events, n	Optimal threshold	AUC	Sensitivity	Specificity	Optimal threshold	AUC	Sensitivity	Specificity	Optimal threshold	AUC	Sensitivity	Specificity
2-years	38	20.99	0.63*	0.85	0.39	79.5	0.67	0.63	0.64	0.48	0.64	0.56	0.68
3-years	29	24.57	0.67	0.44	0.81	82.1	0.70	0.76	0.75	0.48	0.68	0.63	0.68
4-years	34	23.89	0.64	0.45	0.75	82.1	0.67	0.50	0.75	0.48	0.66	0.63	0.63
5-years	31	23.51	0.66*	0.54	0.71	83.6	0.70	0.54	0.79	0.50	0.69	0.54	0.76
6-years	39	23.41	0.68	0.57	0.70	79.7	0.70	0.65	0.65	0.48	0.70	0.63	0.68
7-years	32	22.26	0.69	0.74	0.57	80.1	0.72	0.66	0.68	0.49	0.72**	0.58	0.75
8-years	20	22.01	0.70	0.78	0.53	80.5	0.71	0.63	0.69	0.49	0.72**	0.63	0.71
9-years	34	22.00	0.69	0.76	0.53	79.3	0.70	0.67	0.64	0.49	0.71**	0.57	0.73
10-years	28	22.03	0.69	0.75	0.54	79.5	0.69	0.65	0.65	0.47	0.71**	0.73	0.59
11-years	22	22.00	0.69	0.75	0.54	79.6	0.69***	0.64	0.66	0.47	0.71**	0.72	0.60
12-years	13	21.11	0.67	0.84	0.42	79.7	0.67***	0.61	0.66	0.47	0.70**	0.68	0.62

AUC, area under the curve; other abbreviations as in Table 1 .

*P < 0.05 BMI vs WC; **P < 0.05 BMI vs WHtR; ***P < 0.05 WC vs WHtR; Other variables with no special mark on the upper right corner had P values > 0.05 after pair-wise comparison.