Table 2.

Item wording, descriptive statistics and internal consistency of the PHQ-4

	Mean (SD)	Corrected item total correlation	Alpha if item deleted	Cronbach’s Alpha
PHQ-2 items
1. Little interest or pleasure in doing things	1.19 (1.05)	0.576	0.794
2. Feeling down, depressed, or hopeless	1.22 (1.01)	0.687	0.741
GAD-2 items
3. Feeling nervous, anxious or on edge	1.27 (1.00)	0.674	0.748
4. Not being able to stop or control worrying	0.95 (1.01)	0.600	0.782
PHQ-2 total score	2.42 (1.86)			0.767
GAD-2 total score	2.22 (1.82)			0.780
PHQ-4 total score	4.63 (3.29)			0.814

SD; Standard deviation, PHQ-4; Patient Health Questionnaire-4, GAD-2; Generalized Anxiety Disorder-2, and PHQ-2; Patient Health Questionnaire-2.