Table 1.
Demographic and sleep-related characteristics
| N | 1592 |
|---|---|
| Sex, Men, n (%) | 575 (36.1) |
| Age, median (IQR) | 74 (69–80) |
| BMI kg/m2, median (IQR) | 22.7 (20.6–24.9) |
| BMI ≤20 kg/m2, n (%) | 319 (20.0) |
| BMI 20–25 kg/m2, n (%) | 894 (56.2) |
| BMI > 25 kg/m2, n (%) | 379 (23.8) |
| Habitual drinker, n (%) | 38 (2.4) |
| Smoking status | |
| Never, n (%) | 1117 (70.2) |
| Past, n (%) | 369 (23.2) |
| Current, n (%) | 106 (6.7) |
| Sleep duration | |
| < 6 h, n (%) | 79 (5.0) |
| 6–7 h, n (%) | 216 (13.6) |
| 7–8 h, n (%) | 429 (27.0) |
| 8–9 h, n (%) | 482 (30.3) |
| ≥ 9 h, n (%) | 385 (24.2) |
| Insomnia symptoms | |
| DIS, n (%) | 432 (27.2) |
| DMS, n (%) | 592 (37.2) |
| DIMS, n (%) | 844 (53.0) |
| K6 global score ≥ 5, n (%) | 134 (8.4) |
Abbreviations: BMI body mass index, DIS difficulty initiating sleep, DIMS difficulty initiating and/or maintaining sleep, DMS difficulty maintaining sleep, IQR interquartile range