Table 3.
Measurement classification scores based on the full range of PSQI-A values
| PSQI-A Cut-off score |
Sensitivity | Specificity | Predictive Value+ |
Predictive Value− |
Correctly Classified |
Likelihood Ratio+ |
Likelihood Ratio− |
|---|---|---|---|---|---|---|---|
| 0 | 100% | 0% | 35% | 100% | 35% | - | - |
| 1 | 97% | 36% | 44% | 97% | 57% | 1.52 | 0.07 |
| 2 | 90% | 56% | 52% | 92% | 68% | 2.07 | 0.17 |
| 3 | 78% | 68% | 56% | 86% | 71% | 2.44 | 0.32 |
| 4 | 71% | 76% | 60% | 83% | 74% | 2.90 | 0.39 |
| 5 | 56% | 87% | 70% | 79% | 76% | 4.38 | 0.50 |
| 6 | 44% | 90% | 69% | 75% | 74% | 4.28 | 0.63 |
| 7 | 32% | 92% | 68% | 72% | 71% | 4.12 | 0.74 |
| 8 | 22% | 96% | 75% | 70% | 71% | 5.71 | 0.81 |
| 9 | 15% | 97% | 75% | 69% | 70% | 5.71 | 0.88 |
| 10 | 12% | 99% | 83% | 68% | 69% | 9.51 | 0.89 |
| 11 | 7% | 100% | 100% | 67% | 68% | - | 0.93 |
| 12 | 5% | 100% | 100% | 67% | 67% | - | 0.95 |
| 15 | 2% | 100% | 100% | 66% | 66% | - | 0.98 |
Note. Values were not calculated for PSQI-A total scores 13 and 14 because these scores were not represented in the present sample. Likelihood Ratios + and − were not calculated because the model was saturated. Likelihood Ratio + was not calculated for PSQI-A total scores 11, 12, and 15 because these scores were not represented in the sample without PTSD. Bold represents values for the suggested cutoff score.