Table 4.

Factor Pattern of the PHQ-9

		Communalities1	Factor 1*
PHQ1	Little interest or pleasure in doing things	0.24	0.48
PHQ2	Feeling down, depressed or hopeless	0.42	0.64
PHQ3	Trouble falling or staying asleep, or sleeping too much	0.008	0.089
PHQ4	Feeling tired or having little energy	0.03	0.17
PHQ5	Poor appetite or overeating	0.003	0.05
PHQ6	Feeling bad about yourself - or that you are a failure or have let yourself or your family down	0.21	0.46
PHQ7	Trouble concentrating on things, such as reading the newspaper or watching television	0.07	0.27
PHQ8	Moving or speaking so slowly that other people could have noticed. Or the opposite - being so fidgety or restless that you have been moving around a lot more than usual	0.02	0.15
PHQ9	Thoughts that you would be better off dead, or of hurting yourself	0.03	0.17

¹The estimate of the amount of variance in the indicator explained by the factor. The communalities are the factor loading squared, given that one factor was extracted.

^*Factor 1 was labeled “dysphoric mood”