| Characteristics | ||
| Age, y (means ± SD) | 29.2 ± 6.8 | |
| Sex, no. (%) | Male | 34 (8.5) |
| Female | 368 (91.5) | |
| Ward, no. (%) | Post-surgical department | 122 (30.5) |
| Internal/medical department | 95 (23.8) | |
| Combination of post-surgical and internal | 58 (14.5) | |
| ICU, CCU, emergency | 60 (15.0) | |
| Operating department | 24 (6.0) | |
| Others | 41 (10.3) | |
| Marriage, no. (%) | Be married | 65 (16.1) |
| Be not married | 339 (83.9) | |
| Children, no. (%) | Have children | 44 (10.9) |
| Do not have children | 359 (89.1) | |
| Live with someone, no. (%) | Living with someone | 118 (29.5) |
| Living alone | 282 (70.5) | |
| Usual exercising, no. (%) | Exercise | 88 (22.1) |
| Don’t exercise | 310 (77.9) | |
| Alcohol, no. (%) | Drink | 178 (44.2) |
| Not drink | 225 (55.8) | |
| Smoking, no. (%) | Smoke | 20 (5.0) |
| Not smoke | 384 (95.0) | |
| Body-mass index (kg/m2, means ± SD) | 20.5 ± 2.6 | |
| >25.0, no. (%) | 23 (6.5) | |
| 18.5 - 25.0 | 266 (75.6) | |
| <18.5 | 63 (17.9) |