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Specificity and Sensitivity Statistics at Each PHQ-3 Cutoff Score
| ISI Score | PHQ-item #3 cutoff | Positive Predictive Value | Negative Predictive Value | Sensitivity | Specificity |
|---|---|---|---|---|---|
| 8 or above | 1 or above (several days or more) | 78.4% | 91% | 82.5% | 84.5% |
| 8 or above | 2 or above (more than half the days) | 100% | 75.5% | 42.5% | 100% |
| 8 or above | Score of 3 (nearly every day) | 100% | 70% | 12.5% | 100% |
