Sample characteristics of observations
| Site A | Site B | Site C | Site D | Site E | |
|---|---|---|---|---|---|
| Number of operations (mean, range of operating duration; hh:mm) | 175 (1:56, 0:27–13:32) | 63 (2:02, 0:27–4:45) | 96 (1:47, 0:22–3:58) | 72 (1:46, 0:30–3:55) | 24 (3:11, 0:43–7:28) |
| Elective orthopaedics | 130 (1:49, 0:27–4:25) | 63 (2:02, 0:27–4:45) | 54 (1:49, 0:27–3:41) | 51 (1:54, 1:01–3:55) | 0 |
| Trauma orthopaedics | 0 | 0 | 42 (1:44, 0:22–3:58) | 0 | 0 |
| Plastic surgery | 45 (2:17, 0:30–13:32) | 0 | 0 | 0 | 0 |
| Vascular surgery | 0 | 0 | 0 | 21 (1:25, 0:30–2.24) | 24 (3:11, 0:43–7:28) |