Table 3.

Test Characteristics for Various Models.

Threshold	Sensitivity, %	Specificity, %	Positive likelihood ratio	Negative likelihood ratio	Positive predictive value, %	Negative predictive value, %
Basic model (demographics, BMI percentile, family history, and acanthosis nigricans)
0	100	0	1.00	–	40	–
5	100	1	1.01	0.00	41	100
10	100	2	1.02	0.00	41	100
15	100	4	1.04	0.00	41	100
20	100	8	1.08	0.00	42	100
25	97	12	1.11	0.23	43	87
30	97	19	1.20	0.15	45	91
35	93	32	1.37	0.22	48	87
40	82	51	1.68	0.36	53	81
45	66	70	2.17	0.49	59	75
50	44	89	3.82	0.64	72	70
55	24	93	3.59	0.81	71	64
60	17	98	8.87	0.85	86	64
65	13	100	–	0.87	100	63
70	7	100	–	0.93	100	61
75	4	100	–	0.96	100	61
80	1	100	–	0.99	100	60
Basic plus random glucose test model
10	100	0	1.00	–	40	–
20	100	1	1.01	0.00	41	100
25	100	3	1.03	0.00	41	100
35	100	6	1.06	0.00	42	100
40	100	9	1.09	0.00	42	100
45	99	20	1.23	0.07	45	95
50	99	32	1.46	0.04	50	97
55	93	49	1.81	0.15	55	91
60	86	60	2.15	0.23	59	86
65	65	78	2.96	0.45	67	77
70	46	89	4.07	0.60	73	71
75	37	93	5.49	0.68	79	69
80	25	97	8.87	0.77	86	66
85	20	98	10.35	0.82	88	64
90	11	98	5.92	0.90	80	62
95	6	99	5.92	0.95	80	61
105	4	100	–	0.96	100	61
110	3	100	–	0.97	100	60
125	1	100	–	0.99	100	60
Basic plus 1-h GCT model
10	100	0	1.00	–	40	–
15	100	1	1.01	0.00	41	100
20	100	5	1.05	0.00	41	100
25	100	7	1.07	0.00	42	100
30	99	10	1.09	0.15	42	91
35	99	17	1.19	0.08	45	95
40	94	26	1.27	0.22	46	87
45	93	43	1.63	0.16	52	90
50	87	59	2.13	0.21	59	87
55	73	76	3.08	0.35	68	81
60	55	87	4.12	0.52	74	74
65	42	93	6.34	0.62	81	71
70	30	97	10.35	0.72	87	67
75	20	99	20.70	0.81	93	65
80	13	100	–	0.87	100	63
90	7	100	–	0.93	100	61
95	4	100	–	0.96	100	61
100	1	100	–	0.99	100	60