Table 4.
Sleep quality dimensions*
| Subjective sleep quality | |
| Very good | 20 (8.3) |
| Good | 47 (19.6) |
| Bad | 121 (50.4) |
| Very bad | 52 (21.7) |
| Sleep latency | |
| Time needed to fall asleep | |
| < 15 minutes | 20 (8.3) |
| 16–30 minutes | 36 (15.0) |
| 31–60 minutes | 96 (40.0) |
| > 61 minutes | 88 (36.7) |
| Falling asleep within 30 minutes | |
| Never | 39 (16.3) |
| < Once/week | 41 (17.1) |
| 1–2 times/week | 82 (34.2) |
| > 3 times/week | 78 (32.5) |
| Sleep duration | |
| > 7 hours | 18 (7.5) |
| 6–6.9 hours | 102 (42.5) |
| 5–5.9 hours | 62 (25.8) |
| < 4.9 hours | 58 (24.2) |
| Daytime dysfunction | |
| Daytime drowsiness | |
| Never | 63 (26.3) |
| < Once/week | 35 (14.6) |
| 1–2 times/week | 78 (32.5) |
| > 3 times/week | 64 (26.7) |
| Problems with lack of energy | |
| No | 24 (10.0) |
| Few | 60 (25.0) |
| Some | 99 (41.3) |
| Major | 57 (23.8) |
| Use of sleeping medication | |
| Never | 64 (26.7) |
| < Once/week | 53 (22.1) |
| 1–2 times/week | 44 (18.3) |
| > 3 times/week | 79 (32.9) |
| Habitual sleep efficiency | |
| > 85% | 17 (7.1) |
| 75–84% | 49 (20.4) |
| 65–74% | 76 (31.7) |
| < 64% | 98 (40.8) |
*
Data are presented as n (%)