Reliability and validity of the Patient Health Questionnaire-4 scale and its subscales of depression and anxiety among US adults based on nativity

Table 3 Correlation matrix between the four items assessing anxiety/depression scores (N = 5,140)

Measure/items	1	2	3
Item1: Nervousness	-
Item 2: Worries	0.82*** (0.81, 0.83)	-
Item 3: Loss of interest	0.69*** (0.67, 0.70)	0.68*** (0.66, 0.69)	-
Item 4: Depressive mood	0.75*** (0.74, 0.76)	0.77*** (0.76, 0.78)	0.75*** (0.74, 0.76)

ISSN: 1471-244X