Baseline characteristics of participants
| Baseline characteristics | No or No (%) |
| Total No of participants | 4826 |
| Mean (standard deviation) age (years) | 29.7 (3.4) |
| Female gender | 2612 (54) |
| Unknown | 203 (4) |
| Mean (standard deviation) body mass index | 23.9 (3.9) |
| Specialty* | |
| Internal medicine | 1109 (24) |
| Family practice | 559 (12) |
| Paediatrics | 650 (14) |
| General surgery and surgical specialties | 416 (9) |
| Emergency medicine | 380 (8) |
| Obstetrics/gynaecology | 249 (5) |
| Psychiatry | 250 (5) |
| Anaesthesiology | 215 (5) |
| Other (including combined) | 807 (17) |
| Cohort | |
| PGY2+ residency, 2003-07 | 1747 (36) |
| PGY2+ residency, 2015-17 | 3079 (64) |
Data are number or number (%) of participants unless stated otherwise. PGY2+ residents=resident physicians at postgraduate year 2 and above.
*Column percentages might not add to 100% owing to rounding.