TABLE 1.
Reliability estimates for the PHQ-9: Cronbach’s alpha internal consistency across ethnic/racial subgroups and McDonald’s omega total for the research and MDS assessment
| Cronbach’s alpha | Explained common variance (eigenvalues) from factor analyses | McDonald’s omega total | |
|---|---|---|---|
| RA PHQ-9 | |||
|
| |||
| Total sample (n = 150) | 0.75 | 35.49 (3.19, 1.10) | 0.87 |
| Black, non-Hispanic (n = 62) | 0.73 | ||
| Hispanic (n = 57) | 0.73 | ||
| White, non-Hispanic (n = 27) | 0.82 | ||
|
| |||
| MDS PHQ-9 | |||
|
| |||
| Total sample (n = 153) | 0.72 | 32.38 (2.91, 1.34, 1.21) | 0.88 |
| Black, non-Hispanic (n = 62) | 0.76 | ||
| Hispanic (n = 58) | 0.71 | ||
| White, non-Hispanic (n = 28) | 0.63 | ||
PHQ-9, 9-item Patient Health Questionnaire; RA, researcher; MDS, Minimum Data Set.