Table 4.
Operating characteristics of various cut-off scores of the PHQ-9 for diagnosing major depression among university student
| Test result variable (s) | Positive if Greater than or Equal Toa | Sensitivity | Specificity | PPV* | NPV* | LR+* | LR-* |
|---|---|---|---|---|---|---|---|
| PHQ-9 | ≥9 | 0.94 | 0.86 | 0.63 | 0.98 | 7.10 | 0.07 |
| ≥10 | 0.90 | 0.93 | 076 | 0.97 | 13.57 | 0.11 | |
| ≥11 | 0.67 | 0.95 | 0.8 | 0.92 | 16.26 | 0.34 | |
| PHQ-2 | ≥2 | 0.96 | 0.53 | 0.36 | 0.98 | 2.08 | 0.07 |
| ≥3 | 0.71 | 0.92 | 0.69 | 0.92 | 9.31 | 0.31 |
*PPV=Positive Predictive Value; NPV=Negative Predictive Value; LR+=Positive likelihood ratio; LR-=Negative likelihood ratio