Table 3.
Internal consistency and homogeneity of the Pittsburgh Sleep Quality Index (PSQI) scores in community dwelling Ethiopian adults
| Components of the PSQI | Component-to- global PSQI score correlations | Cronbach’s Alpha if Component Deleted |
|---|---|---|
| PSQI component of sleep quality | .50 | .58 |
| PSQI component of sleep latency | .56 | .52 |
| PSQI component of sleep duration | .81 | .43 |
| PSQI component of sleep efficiency | .81 | .45 |
| PSQI component of sleep disturbances | .34 | .58 |
| PSQI component of sleep medication | .18 | .60 |
| PSQI component of daytime dysfunction | .15 | .60 |