| Variable | Classification | |
| Age (yrs) | 24.1 ± 0.3 | |
| Height (cm) | 174.8 ± 0.9 | |
| Weight (kg) | 74.2 ± 1.2 | |
| BMI (kg/m2) | 23.0 ± 0.6 | |
| Gender (%) | Male | 30 (100.0) |
|
| Female | - |
| Blood type (%) | AB | 2 (6.7) |
|
| A | 8 (26.7) |
| B | 14 (46.7) | |
|
| O | 6 (20.0) |
| Smoking (%) | Smoker | 15 (50.0) |
|
| Nonsmoker | 15 (50.0) |
| Drinking (%) | Yes | 30 (100.0) |
|
| No | - |
|
| 1 bottle/week | 16 (53.3) |
| 2 bottle/week | 14 (46.7) | |
| PSQI (score) | 1.8 ± 0.1 | |
| Skin injury (%) | Injuries experience | 18 (60.0) |
| Injuries inexperience | 5 (16.7) | |
| Don’t know | 7 (23.3) | |
| Type of skin injury (%) | Abrasion | 12 (40.0) |
| Burns | 3 (10.0) | |
| Incised wound | 3 (10.0) | |
| Nothing | 12 (40.0) |