Assessing post-traumatic stress disorder in South African adolescents: using the child and adolescent trauma survey (CATS) as a screening tool

Table 3 Receiver Operator Characteristic (ROC) and Predictive Values

Cut-off Values	Sensitivity	Specificity	1-specificity	Gradient	Predictive Values
					Positive	Negative
0	100	0	100	--	--	--
1	100	2	98	0	22	100
3	100	17	83	0	22	100
4	91	21	79	2.25	21	91
5	91	23	77	0	22	92
7	91	28	72	0	23	93
8	91	32	68	0	24	94
9	91	36	64	0	25	94
10	82	36	64	∞	23	90
11	82	40	60	0	24	91
12	82	47	53	0	27	92
13	82	53	47	0	29	93
14	82	62	38	0	33	94
15	73	70	30	1.12	36	92
16	64	81	19	0.82	44	91
17	64	87	13	0	44	91
18	55	87	13	∞	50	89
19	55	92	8	0	60	90
20	55	94	6	0	67	90
21	55	98	2	0	86	90
22	55	100	0	0	100	90
23	36	100	0	∞	100	87
25	18	100	0	∞	100	84
27	9	100	0	∞	100	83

ISSN: 1744-859X