Table 3.
Sleep-related trouble according to the presence of residual symptoms.
| Residual symptoms | p value | ||||
|---|---|---|---|---|---|
| None (N = 331) | One or more (N = 1,274) | ||||
| Mean | SD | Mean | SD | ||
| Nights out of 7 with trouble falling asleep | 5.1 | 2.3 | 5.3 | 2.0 | 0.297∗ |
| Nights out of 7 with trouble staying asleep | 5.4 | 2.2 | 5.4 | 2.2 | 0.856 |
| Number of days out of 7 waking before alarm | 4.6 | 2.6 | 4.5 | 2.5 | 0.253 |
| Number of days out of 7 waking tired/unrested | 4.6 | 2.4 | 5.6 | 1.9 | <0.001∗ |
| Nights out of 7 with any problem above | 6.0 | 1.5 | 6.1 | 1.5 | 0.891 |
| Sleep problems interfere with home management | 3.9 | 3.0 | 5.6 | 2.8 | <0.0001 |
| Sleep problems interfere with ability to work | 3.1 | 3.1 | 4.6 | 3.2 | <0.0001 |
| Sleep problems interfere with social relationships | 3.6 | 3.2 | 5.3 | 3.0 | <0.0001 |
| Sleep problems interfere with close relationships | 3.3 | 3.2 | 5.2 | 3.1 | <0.0001 |
Note: ∗ indicates Welch's test was used in lieu of parametric t-test due to nonhomogeneity of variance.