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Table 3 Receiver Operator Characteristic (ROC) and Predictive Values

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

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