| Characteristics | Candidates (n) | Percentage of total |
| Total | 61 | |
| Age(years) | ||
| 23–24 | 12 | 19.7 |
| 25–26 | 21 | 34.4 |
| 27–28 | 12 | 19.7 |
| 29–30 | 6 | 9.8 |
| >30 | 10 | 16.4 |
| Gender | ||
| Male | 29 | 47.5 |
| Female | 32 | 52.5 |
| Specialty | ||
| Medical | 31 | 50.8 |
| Surgical | 30 | 49.2 |
| Grade | ||
| Foundation | 47 | 77.0 |
| ST1-3 | 9 | 14.8 |
| ST3+ | 5 | 8.2 |
| Smoking status | ||
| Smoker | 4 | 6.6 |
| Non-smoker | 50 | 82.0 |
| Ex-smoker | 7 | 11.4 |
| Alcohol intake, units | ||
| 0–14 | 51 | 83.6 |
| 14–21 | 6 | 9.8 |
| >21 | 4 | 6.6 |
| BMI, mean (SD) | ||
| Male | 25.3 (3.6) | 24.5 (3.6) |
| Female | 21.8 (2.1) | 21.4 (2.1) |
BMI, body mass index.