Table 5 Test-retest reliability for the seven PSQI components and the PSQI global score (bold text) (N = 64 cases)
PSQI component | ICC (95% CI) | Mean of the differences (95% CI) | Limits of agreement | p value for Pitman’s Test |
|---|---|---|---|---|
Subjective sleep quality | 0.76 (0.66 to 0.86) | -0.06 (-0.19 to 0.07) | -1.12 to 1.00 | 0.775 |
Sleep latency | 0.77 (0.68 to 0.87) | 0.09 (-0.06 to 0.25) | -1.18 to 1.36 | 0.740 |
Sleep duration | 0.73 (0.62 to 0.84) | 0.03 (-0.12 to 0.18) | -1.15 to 1.21 | 0.214 |
Habitual sleep efficiency | 0.57 (0.40 to 0.73) | -0.08 (-0.38 to 0.22) | -2.50 to 2.35 | 0.535 |
Sleep disturbances | 0.69 (0.57 to 0.82) | 0.05 (-0.07 to 0.17) | -0.92 to 1.02 | 0.992 |
Use of sleep medication | 0.91 (0.87 to 0.95) | 0.09 (-0.03 to 0.22) | -0.90 to 1.08 | 0.358 |
Daytime dysfunction | 0.60 (0.44 to 0.75) | 0.00 (-0.16 to 0.16) | -1.28 to 1.28 | 0.356 |
PSQI global score | 0.86 (0.80 to 0.92) | 0.12 (-0.37 to 0.62) | -3.83 to 4.08 | 0.679 |