Sensitivity | Specificity | PPV | Youden Index | |
BDI cut-off score | ||||
4 | 100 | 56.4 | 9.7 | 0.564 |
5 | 100 | 60.0 | 10.5 | 0.600 |
6 | 75.0 | 67.0 | 9.6 | 0.420 |
7 | 75.0 | 74.1 | 12.0 | 0.491 |
8 | 75.0 | 80.0 | 15.0 | 0.550 |
9 | 75.0 | 82.3 | 16.6 | 0.573 |
10 | 75.0 | 84.7 | 18.7 | 0.597 |
11 | 50.0 | 87.0 | 15.3 | 0.370 |
12 | 50.0 | 90.5 | 20.0 | 0.405 |
13 | 50.0 | 91.7 | 22.2 | 0.417 |
14 | 50.0 | 92.9 | 25.0 | 0.429 |
15 | 50.0 | 92.9 | 25.0 | 0.429 |
16 | 25.0 | 94.1 | 16.6 | 0.191 |
17 | 25.0 | 95.2 | 20.0 | 0.202 |
18 | 0 | 98.8 | 25.0 | 0.214 |
TQI cut-off score | ||||
1 | 100 | 60.0 | 10.5 | 0.600 |
2 | 75.0 | 88.2 | 23.0 | 0.632 |
BDI | TQI | Sensitivity | Specificity | PPV | Youden Index |
Pairs of cut-off scores | |||||
4 | 2 | 100 | 56.4 | 9.7 | 0.564 |
5 | 2 | 100 | 60.0 | 10.5 | 0.600 |
6 | 2 | 100 | 65.8 | 12.1 | 0.658 |
7 | 2 | 100 | 72.9 | 14.8 | 0.729 |
8 | 2 | 100 | 75.2 | 16.0 | 0.752 |
9 | 2 | 100 | 76.4 | 16.6 | 0.764 |
10 | 2 | 100 | 77.6 | 17.3 | 0.776 |
11 | 2 | 75.0 | 80.0 | 15.0 | 0.550 |
12 | 2 | 75.0 | 82.3 | 16.6 | 0.573 |
13 | 2 | 75.0 | 82.3 | 16.6 | 0.573 |
14 | 2 | 75.0 | 83.5 | 17.6 | 0.585 |
15 | 2 | 75.0 | 83.5 | 17.6 | 0.585 |
16 | 2 | 75.0 | 84.7 | 18.7 | 0.597 |
17 | 2 | 75.0 | 85.8 | 20.0 | 0.608 |
18 | 2 | 75.0 | 87.0 | 21.4 | 0.620 |
4 | 1 | 100 | 47.0 | 8.1 | 0.470 |
5 | 1 | 100 | 49.4 | 8.5 | 0.491 |
6 | 1 | 100 | 52.9 | 9.0 | 0.529 |
7 | 1 | 100 | 55.2 | 9.5 | 0.552 |
8 | 1 | 100 | 56.4 | 9.7 | 0.564 |
9 | 1 | 100 | 56.4 | 9.7 | 0.564 |
10 | 1 | 100 | 56.4 | 10.0 | 0.576 |
11 | 1 | 100 | 57.6 | 10.0 | 0.576 |
12 | 1 | 100 | 57.6 | 10.5 | 0.600 |
13 | 1 | 100 | 60.0 | 10.5 | 0.600 |
14 | 1 | 100 | 60.0 | 10.5 | 0.600 |
15 | 1 | 100 | 60.0 | 10.5 | 0.600 |
16 | 1 | 100 | 60.0 | 10.5 | 0.600 |
17 | 1 | 100 | 60.0 | 10.5 | 0.600 |
18 | 1 | 100 | 60.0 | 10.5 | 0.600 |
BDI, Beck Depression Inventory; PPV, positive predictive value; TQI, two-question case-finding instrument.