Table 4 Discriminative validity: Comparison of the Pittsburgh Sleep Quality Index (PSQI) scores between normal sleepers and insomniacs as determined by clinical interview in community dwelling Ethiopian adults
From: Validation of the Pittsburgh sleep quality index in community dwelling Ethiopian adults
Components of the PSQI | Mean rank | p-value | |
|---|---|---|---|
Normal sleepers | Primary Insomniacs | ||
PSQI component of sleep quality | 90.88 | 189.19 | <0.01 |
PSQI component of sleep latency | 94.47 | 187.36 | <0.01 |
PSQI component of sleep duration | 131.25 | 168.61 | <0.01 |
PSQI component of sleep efficiency | 131.11 | 168.68 | <0.01 |
PSQI component of sleep disturbances | 130.65 | 168.92 | <0.01 |
PSQI component of sleep medication | 155.00 | 156.51 | 0.52 |
PSQI component of daytime dysfunction | 154.40 | 156.82 | 0.58 |
Global PSQI scorea | 4.70 ± 3.46 | 8.11 ± 2.61 | <0.01 |