Table 3.
Pearson correlations among the PHQ-9 items and total score (n = 768).a
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | PHQ-9 Total | |
|---|---|---|---|---|---|---|---|---|---|---|
| Item 1 | -- | |||||||||
| Item 2 | 0.530** | -- | ||||||||
| Item 3 | 0.476** | 0.484** | -- | |||||||
| Item 4 | 0.522** | 0.531** | 0.541** | -- | ||||||
| Item 5 | 0.490** | 0.563** | 0.547** | 0.533** | -- | |||||
| Item 6 | 0.475** | 0.642** | 0.410** | 0.518** | 0.545** | -- | ||||
| Item 7 | 0.474** | 0.503** | 0.439** | 0.551** | 0.494** | 0.534** | -- | |||
| Item 8 | 0.375** | 0.523** | 0.390** | 0.446** | 0.505** | 0.498** | 0.518** | -- | ||
| Item 9 | 0.343** | 0.580** | 0.335** | 0.368** | 0.455** | 0.542** | 0.376** | 0.457** | -- | |
| PHQ-9 Total | 0.709** | 0.802** | 0.710** | 0.758** | 0.780** | 0.779** | 0.738** | 0.700** | 0.655** | -- |
a
Statistical significance levels: *p < 0.050; **p < 0.010; ***p < 0.001.