Table 3.

Standardized factor loadings for the modified model of the PHQ-9

PHQ-9 item	Factor loadings
1. Anhedonia	0.73
2. Depressed mood	0.79
3. Sleep difficulties	0.61
4. Fatigue	0.53
5. Appetite changes	0.54
6. Feeling of worthlessness	0.53
7. Concentration difficulties	0.74
8. Psychomotor agitation/retardation	0.70
9. Thoughts of death	0.72

PHQ-9: Patient Health Questionnaire-9