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. 2020 Jul 6;22(7):e18723. doi: 10.2196/18723

Table 5.

Changes in depression and anxiety symptoms for participants starting at clinical levels of depression or anxiety symptoms (n=385).

Measure Baseline score, mean (SD) Follow-up score, mean (SD) Paired differences, mean (SD) 95% CI of the difference t-value (df) P value Cohen d
PHQ-9a 10.77 (4.71) 5.57 (4.92) 5.20 (5.52) 4.52-5.88 18.49 (384) <.001 1.08
GAD-7b 11.72 (3.89) 6.07 (4.55) 5.65 (5.40) 5.06-6.25 20.55 (384) <.001 1.33

a Patient Health Questionnaire-9

b Generalized Anxiety Disorder-7