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Concordance correlation coefficients C_b between the value in the paper survey and the average value in the biweekly app survey.
| Survey | Days before and after the paper survey, number of patients reporting through the app, and scores | |||
|
|
Same day (n=18) | 3 days (n=39) | 7 days (n=63) | 14 days (n=96) |
|
|
|
|
|
|
| PHQ-9a sum | .941 | .967 | .901 | .894 |
| PHQ-10b | .940 | .938 | .879 | .936 |
aPHQ-9: Patient Health Questionnaire–9.
bPHQ-10: Patient Health Questionnaire Q10.
