Table 3 Polychoric correlations between R-SMS-DS score and PHQ-9 items
PHQ-9 items | Group 2 | Group 3 | Grp 2 - Grp 3 |
|---|---|---|---|
Patients with PHQ-9 & R-SMS-DS (any time) N = 337 | Patients with PHQ-9 & R-SMS-DS (within 6 days) N = 213 | Patients with PHQ-9 & R-SMS-DS (outside 6 days) N = 113 | |
1. Loss of interest (anhedonia) | .573 | .593 | .545 |
2. Depressed mood | .607 | .619 | .561 |
3. Sleep disturbance | .474 | .458 | .517 |
4. Fatigue | .479 | .487 | .481 |
5. Appetite changes | .472 | .513 | .425 |
6. Feeling bad about oneself | .588 | .665 | .454 |
7. Concentration difficulties | .450 | .485 | .414 |
8. Psychomotor disturbance | .421 | .404 | .473 |
9. Thoughts of death/self-harm | .436 | .472 | .381 |