Competence levels (University of Birmingham regulations—see online supplementary appendix 3)
| Competence level | Total number of students | Students taught by GTA (intervention) | Students taught on a manikin (control) | Additional competence of GTA compared with manikin |
| <50% | 95 | 43 | 52 | −9 |
| ≥50% | 310 | 161 | 149 | +12 |
| ≥60% | 240 | 134 | 106 | +28 |
| ≥70% | 182 | 105 | 77 | +28 |
GTA, Gynaecology Teaching Associate.