Table 2.
Characteristics of groups according to alcohol intake at bedtime
| Continued no alcohol intake at bedtime (n= 23) | Habitual alcohol intake at bedtime at baseline | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Stopped intake(n= 8) | Continued intake (n= 7) |
P (stopped vs. continued) |
|||||||
| n | Baseline | n | Baseline | n | Baseline | ||||
| Age (years, mean ± SD) | 48.0 ± 9.3 | 50.9 ± 6.3 | 49.3 ± 11.2 | 0.74a | |||||
| Men, n (%) | 10 (43.5%) | 5 (62.5%) | 7 (100.0%) | 0.07b | |||||
| Number of times of alcohol intake at bedtime per week at program end (mean ± SD) | – | 3.2 ± 2.4 | 6.9 ± 0.4 | 0.004a | |||||
| Alcohol intake at bedtime 5 times or more per week (%) | – | 2 (25.0%) | 7 (100.0%) | 0.003b | |||||
| PSQI (score, mean ± SD) | 20 | 5.1 ± 2.9 | 7 | 6.3 ± 0.8 | 6 | 4.3 ± 1.5 | 0.01a | ||
| ESS (score, mean ± SD) | 23 | 8.3 ± 3.2 | 7 | 9.4 ± 3.3 | 7 | 7.0 ± 3.4 | 0.20a | ||
| ISI (score, mean ± SD) | 22 | 6.0 ± 4.2 | 8 | 8.9 ± 2.7 | 7 | 5.6 ± 3.5 | 0.06a | ||
| Sleep duration(min, mean ± SD) | 23 | 383.0 ± 56.4 | 8 | 402.5 ± 21.9 | 7 | 402.9 ± 34.0 | 0.98a | ||
a: Student t-test, b: chi-square test, SD: standard deviation.