Table IV.
Comparison of sleep status and health related quality of life in Evening type.
| Early working condition (n = 28) | Normal working condition (n = 29) | p - value | |
|---|---|---|---|
| Age (years)a) | 28.5 (25.8 – 34.3) | 29.0 (26.0 – 33.0) | 0.707 |
| Gender (Men/Women)b) | M10/W18 | M14/W15 | 0.337 |
| MEQ (scores)c) | 44.5 ± 5.5 | 46.7 ± 4.4 | 0.096 |
| Sleep variables | |||
| Sleep onset time (h:mm)a) | 0:00 (23:22 – 0:30) | 0:30 (0:00 – 1:00) | 0.003** |
| Sleep offset time (h:mm)c) | 6:31 ± 0:45 | 6:52 ± 0:28 | 0.045* |
| Total sleep time (h)a) | 6.5 (6.4 – 7.0) | 6.3 (5.8 – 7.0) | 0.093 |
| PSQI-J (scores)c) | 6.2 ± 2.4 | 5.0 ± 2.1 | 0.047* |
| SF-36v2 | |||
| PCS (scores)c) | 58.7 ± 6.6 | 56.5 ± 5.5 | 0.163 |
| MCS (scores)a) | 49.3 (37.7 – 51.8) | 50.2 (43.6 – 53.1) | 0.444 |
| RCS (scores)c) | 43.7 ± 11.8 | 48.3 ± 9.6 | 0.115 |
All values expressed as mean ± SD or median (25 – 75 percentile). * p < 0.05 and ** p < 0.01 by uing Mann-Whitney U testa), χ2- testb) or two sample t-testc). MEQ, the Morningness-Eveningness Questionnaire; PSQI-J, the Japanese version of the Pittsburg Sleep Quality Index; SF-36v2, the Japanese MOS Short-Form 36-Item Health Survey ver2; PCS, Physical component score; MCS, Mental component score; RCS, Role-social component score