Table 2.

Results of exploratory factor analysis.

	One factor		Two factors
PHQ-9 item description	Factor loadings	Communalities	Factor I loadings	Factor II loadings
Feeling down, depressed, hopeless	0.744*	0.554	0.389	0.401*
Anhedonia	0.573*	0.329	0.335	0.276
Poor appetite	0.643*	0.414	0.230*	0.458*
Difficulty sleeping	0.639*	0.408	0.735*	−0.007
Psychomotor retardation/agitation	0.617*	0.380	−0.021	0.676*
Little energy	0.677*	0.458	0.771*	0.006
Feeling bad about yourself	0.740*	0.547	0.132	0.646*
Trouble concentrating	0.712*	0.507	0.002	0.759*
Thoughts of suicide/death	0.467*	0.218	−0.015	0.499*

^*Indicates value is significant at p < 0.05, items with loadings above 0.400 are bolded. Factor analysis was conducted with maximum likelihood estimation extraction with oblique rotation. Communalities were reported for variance explained of each item in the one factor model.