Table 1.
Test–retest reliability for PSQI-M global score and subcomponents.
| PSQI Subcomponents | Test M ± SD |
Retest M ± SD |
ICC a | 95% CI | 95% LoA | SEM | |
|---|---|---|---|---|---|---|---|
| PSQI Global Score | 5.30 ± 1.85 | 5.36 ± 2.47 | 0.58 | 0.43–0.69 | −2.81–4.41 | 1.34 | |
| C1 | Sleep Quality | 0.89 ± 0.59 | 0.82 ± 0.60 | 0.59 | 0.45–0.70 | 0.08–0.50 | 0.38 |
| C2 | Sleep Latency | 0.72 ± 0.71 | 0.84 ± 0.76 | 0.54 | 0.40–0.66 | −0.42–0.56 | 0.50 |
| C3 | Sleep Duration | 1.35 ± 0.72 | 1.36 ± 0.78 | 0.62 | 0.50–0.73 | 0.45–1.31 | 0.46 |
| C4 | Sleep Efficiency | 0.49 ± 0.76 | 0.44 ± 0.81 | 0.53 | 0.38–0.65 | −0.05–1.10 | 0.54 |
| C5 | Sleep Disturbance | 1.19 ± 0.50 | 1.13 ± 0.48 | 0.45 | 0.29–0.59 | 0.00–0.52 | 0.36 |
| C7 | Daytime Dysfunction | 0.67 ± 0.53 | 0.66 ± 0.63 | 0.40 | 0.23–0.55 | 0.47–1.29 | 0.45 |
PSQI: Pittsburgh Sleep Quality Index, M: Mean, SD: Standard deviation, ICC: intraclass correlation coefficient, CI: Confidence interval, LoA: Limits of agreement, SEM: Standard error measure. a Two-way mixed model, absolute agreement, and single measure were used.