Behavioural optimisation to address trial conduct challenges: case study in the UK-REBOA trial

Table 1 Participant demographics for both phases of the study

Characteristic	Phase 1	Phase 2	Total
N	13	5	18 ^a
Sites	5	4	8 ^a
Roles
Trauma consultant	6	2	7 ^a
Trauma surgeon	2	-	2
Trauma registrar	2	-	2
Research nurse	2	1	3
Radiologist	1	-	1
Trauma anaesthetist	-	2	2

ISSN: 1745-6215