Table 1.
Physical characteristics of the all participants and each chronotype group.
| All (n = 24) | Morningness (n = 8) | Intermediate (n = 8) | Eveningness (n = 8) | P value | |
|---|---|---|---|---|---|
| Age (years) | 26.5 ± 0.9 | 27.9 ± 1.3 | 25.9 ± 2.3 | 25.1 ± 1.2 | 0.440 |
| Height (cm) | 172.8 ± 1.0 | 173.7 ± 2.3 | 173.4 ± 1.9 | 171.0 ± 1.6 | 0.465 |
| Weight (kg) | 68.1 ± 1.7 | 66.9 ± 2.1 | 71.4 ± 4.5 | 64.9 ± 1.5 | 0.169 |
| BMI | 22.7 ± 0.4 | 22.2 ± 0.6 | 23.8 ± 1.2 | 22.2 ± 0.6 | 0.199 |
| MEQ score | 49.5 ± 2.6 | 63.3 ± 1.3 | 50.1 ± 2.1** | 35.3 ± 2.2**,## | 0.001 |
| Waking time at weekday (h) | 7.4 ± 0.3 | 6.4 ± 0.3 | 7.6 ± 0.6 | 8.3 ± 0.2** | 0.004 |
| Bedtime at weekday (h) | 24.3 ± 0.3 | 23.4 ± 0.5 | 24.5 ± 0.5 | 25.0 ± 0.2* | 0.020 |
| Waking time at weekend (h) | 9.0 ± 0.4 | 7.0 ± 0.6 | 9.6 ± 0.5** | 10.5 ± 0.5** | 0.001 |
| Bedtime at weekend (h) | 24.9 ± 0.3 | 23.6 ± 0.4 | 25.3 ± 0.4** | 25.9 ± 0.4** | 0.001 |
| Social jetlag time (h) | 1.1 ± 0.2 | 0.4 ± 0.2 | 1.4 ± 0.3** | 1.5 ± 0.2** | 0.002 |
All data are presented as means ± SE.
P value: One-way ANOVA; among groups, *P < 0.05, **P < 0.01 vs Morningness; ##P < 0.01 vs Intermediate.