Outcome measures
RECRUITMENT
To answer our feasibility objectives, we assessed:Recruitment feasibility—by screening log data on: number of potential participants and their caregivers assessed for eligibility, including reasons for exclusion/non-participation, and consented to be randomised; timing and location of approach and consent.Intervention acceptability—by qualitative interviews with participants and health professionals; acceptability questionnaire, study attrition at the intervention phase.Intervention fidelity (healthcare professionals)—by intervention log data on: HIP HELPER session duration, frequency, location (orthopaedic/orthogeriatric ward, rehabilitation ward or other); quality assurance (QA) to monitor HIP HELPER programme delivery.Intervention fidelity (caregivers)—by caregiver HIP HELPER programme intervention logs; qualitative interviews.Randomisation acceptability—by screening logs, eligibility assessment logs and consent forms; participant attrition; qualitative investigation.Risk of contamination—by HIP HELPER programme log data including: QA monitoring visit checklists; delegation logs; qualitative interviews with health professionals.Completeness of outcome measures—by completion rates (baseline and 4 months post randomisation). Outcome measures collected are included in 
