| Variable | Classification | |
| Age (yrs) | 23.9 ± 0.4 | |
| Height (cm) | 175.3 ± 0.7 | |
| Weight (kg) | 71.3 ± 2.4 | |
| BMI (kg/m2) | 23.1 ± 0.6 | |
| Gender (%) | Male | 30 (100.0) |
|
| Female | - |
| Blood type (%) | AB | 4 (13.3) |
|
| A | 12 (40.0) |
| B | 10 (33.3) | |
|
| O | 4 (13.3) |
| Smoking (%) | Smoker | 3 (10.0) |
|
| Nonsmoker | 27 (90.0) |
| Drinking (%) | Yes | 29 (96.7) |
|
| No | 1 (3.3) |
|
| 1 bottle/week | 20 (69.0) |
| 2 bottle/week | 9 (31.0) | |
| PSQI (score) | 2.2 ± 0.1 | |
| Skin injury (%) | Injuries experience | 22 (73.3) |
| Injuries inexperience | 8 (26.7) | |
| Don't know | - | |
| Type of skin injury (%) | Abrasion | 15 (68.2) |
| Burns | 6 (27.3) | |
| Incised wound | 1 (4.5) | |
| Nothing | 8 (26.7) |