Parent and staff characteristics for the qualitative study
A total of 65 parents of randomised children completed the survey. This included parents who consented to ongoing participation in the trial (n = 63) and some who declined consent (n = 2). 15 were parents (23%) of children in the intervention group (SDD), 24 (36%) in the control (standard care) group, and 24 (36%) during ecology week. The survey was completed by 44 staff members, with 23 (52%) being nurses and 19 (43%) doctors, representing a total of 11 UK PICUs. Six focus groups were conducted, which involved 26 staff members, with 17 (65%) being nurses, 8 (30%) being doctors, and 1 (5%) being a pharmacist.