Table 3.

PHQ-9 item level values and item-total correlations

PHQ-9 item	Corrected item-total correlation	Alpha if item deleted
Little interest or pleasure in doing things	0.62	0.77
Feeling down, depressed, or hopeless	0.74	0.75
Trouble falling or staying asleep	0.52	0.79
Feeling tired or having little energy	0.64	0.78
Poor appetite or overeating	0.54	0.79
Feeling bad about self	0.72	0.75
Trouble concentrating	0.56	0.78
Moving or speaking slowly	0.55	0.78
Thoughts of being better off dead	0.641	0.77

^*Overall Chronbach's Alpha = 0.81