Table III.
Comparison of sleep status and health related quality of life in Morning type.
| Early working condition (n = 37) | Normal working condition (n = 32) | p - value | |
|---|---|---|---|
| Age (years)a) | 32.0 (29.0 – 36.0) | 29.0 (25.0 – 39.3) | 0.563 |
| Gender (Men/Women)b) | M22/W15 | M19/W13 | 0.994 |
| MEQ (scores)a) | 58.0 (56.0 – 62.0) | 56.5 (55.0 – 59.0) | 0.116 |
| Sleep variables | |||
| Sleep onset time (h:mm)a) | 0:00 (23:00 – 0:00) | 0:00 (0:00 – 0:30) | 0.055 |
| Sleep offset time (h:mm)c) | 5:54 ± 0:43 | 6:24 ± 0:43 | 0.006** |
| Total sleep time (h)c) | 6.2 ± 1.0 | 6.3 ± 1.0 | 0.593 |
| PSQI-J (scores)a) | 4.0 (3.0 – 5.0) | 4.5 (2.8 – 7.0) | 0.589 |
| SF-36v2 | |||
| PCS (scores)c) | 57.0 ± 7.4 | 57.2 ± 5.2 | 0.900 |
| MCS (scores)a) | 48.5 (45.3 – 53.8) | 49.9 (46.4 – 55.0) | 0.427 |
| RCS (scores)a) | 50.8 (46.1 – 57.6) | 51.8 (45.2 – 55.7) | 0.674 |
All values expressed as mean ± SD or median (25 – 75 percentile). ** p < 0.01 by using Mann-Whitney U testa), χ2- testb) and 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