Table 4.
Total score of the 14 items at baseline: area under the ROC Curve (AUC), sensitivity and specificity in identifying current and future self-harm
| |
Males |
Females |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AUC | Cut-off * | % scoring above cut-off * | Sens (%) | Spec (%) | Corr class (%) | AUC | Cut-off * | % scoring above cut-off * | Sens (%) | Spec (%) | Corr class (%) | |
|
Current self-harm |
0.81 |
|
|
|
|
|
0.87 |
|
|
|
|
|
| |
≥7 |
40.9 |
85.71 |
56.91 |
58.91 |
|
≥10 |
34.7 |
90.56 |
66.04 |
68.77 |
|
| |
≥8 |
33.9 |
83.93 |
63.96 |
65.35 |
|
≥11 |
29.7 |
87.22 |
71.88 |
73.58 |
|
|
Suggested cut-off |
|
≥9 |
27.1 |
77.68 |
71.08 |
71.53 |
|
≥12 |
25.7 |
82.22 |
76.39 |
77.04 |
| |
|
≥10 |
18.2 |
72.32 |
77.39 |
77.04 |
|
≥13 |
22.7 |
77.22 |
80.35 |
80.00 |
| |
≥11 |
14.7 |
67.86 |
82.05 |
81.06 |
|
≥14 |
19.7 |
76.11 |
82.99 |
82.22 |
|
|
6 month self-harm |
0.74 |
|
|
|
|
|
0.81 |
|
|
|
|
|
| |
≥7 |
|
79.84 |
56.77 |
58.54 |
|
≥10 |
|
80.50 |
65.42 |
67.28 |
|
| |
≥8 |
|
73.39 |
63.40 |
64.17 |
|
≥11 |
|
76.00 |
71.13 |
71.13 |
|
| |
≥9 |
|
67.74 |
70.64 |
70.42 |
|
≥12 |
|
76.00 |
71.13 |
71.73 |
|
| |
≥10 |
|
61.29 |
76.68 |
75.50 |
|
≥13 |
|
68.50 |
79.93 |
78.52 |
|
| |
≥11 |
|
57.26 |
81.57 |
79.70 |
|
≥14 |
|
67.00 |
82.61 |
80.68 |
|
| 12 month self-harm |
0.68 |
|
|
|
|
|
0.77 |
|
|
|
|
|
| |
≥7 |
|
67.77 |
55.72 |
56.62 |
|
≥10 |
|
76.47 |
64.97 |
66.42 |
|
| |
≥8 |
|
61.98 |
62.47 |
62.44 |
|
≥11 |
|
72.06 |
70.69 |
70.86 |
|
| |
≥9 |
|
57.02 |
69.70 |
68.75 |
|
≥12 |
|
67.65 |
75.28 |
74.32 |
|
| |
≥10 |
|
53.72 |
76.19 |
74.50 |
|
≥13 |
|
60.78 |
78.88 |
76.67 |
|
| ≥11 | 48.76 | 80.80 | 78.40 | ≥14 | 56.86 | 81.29 | 78.21 | |||||
*Cut-offs refer to total scores at baseline and their ability to identify those currently reporting self-harm or doing so 6 and 12 months later. Data shown for two points around the suggested baseline cut-off point for girls (≥12) and boys (≥9). Sens, Sensitivity, Spec, Specificity, Corr class, Correctly classified.