Participant demographics for rounds 1 and 2
| Demographics | Round 1 n (%) | Round 2 n (%) |
| Role | ||
| Prehospital care doctor | 11 (14.1%) | 6 (8%) |
| Hospital doctor | 1 (1.3%) | 1 (1.3%) |
| Prehospital care doctor and hospital doctor | 46 (59%) | 38 (50.7%) |
| Critical care paramedic | 18 (23.1%) | 9 (12%) |
| Other | 2 (2.6%) | 3 (4%) |
| Missing | 0 (0%) | 18 (24%) |
| Hospital doctor specialty | ||
| Anaesthetics | 13 (27.7%) | 10 (25.6%) |
| Emergency Medicine | 29 (61.7%) | 25 (64.1%) |
| Intensive Care Medicine | 1 (2.1%) | 1 (2.6%) |
| Dual Specialty | 4 (8.5%) | 2 (5.1%) |
| Missing | 0 (0%) | 1 (2.6%) |
| Years of experience in the prehospital setting | ||
| ≥6 months, ≤6 years | 26 (33.3%) | 21 (28%) |
| >6 years, ≤12 years | 21 (26.9%) | 15 (20%) |
| >12 years | 30 (38.5%) | 20 (26.7%) |
| Missing | 1 (1.3%) | 19 (25.3%) |
| Country or countries in which participant is based* | ||
| England | 70 (89.7%) | 51 (68%) |
| Scotland | 6 (7.7%) | 4 (5.3%) |
| Wales | 8 (10.3%) | 3 (4%) |
| Ireland | 3 (3.8%) | 2 (2.7%) |
| Missing | 0 (0%) | 18 (24%) |
| Prehospital research experience* | ||
| None | 17 (21.8%) | 15 (20%) |
| Previous involvement with research | 0 (0%) | 6 (8%) |
| Currently involved with some prehospital research projects | 39 (50%) | 26 (34.7%) |
| Publication of 1–4 peer-reviewed prehospital research papers (any authorship) | 18 (23.1%) | 12 (16%) |
| Publication of≥5 peer-reviewed prehospital research papers (any authorship) | 10 (12.8%) | 4 (5.3%) |
| Other (eg, principal investigator on funded project) | 6 (7.7%) | 2 (2.7%) |
| Missing | 0 (0%) | 19 (25.3%) |
*Some participants reported being based in more than one country of the UK, and some participants selected more than one response for prehospital research experience, therefore total numbers exceed 78 and 75 for rounds 1 and 2, respectively.