Grade of physician and nature of injury
| No. of cases | |||||
| Wrong location | Lost wire | Wrong side | Lung/chest injury | Total | |
| Consultant | 3 | 0 | 1 | 6 | 10 |
| Staff grade doctor | 1 | 0 | 0 | 0 | 1 |
| Trainee >4 years training | 11 | 1 | 3 | 21 | 36 |
| Trainee 2–4 years training | 9 | 2 | 1 | 11 | 23 |
| Trainee 0–2 years training | 4 | 0 | 0 | 0 | 4 |
| Not recorded | 3 | 0 | 1 | 9 | 13 |