Table 1.

Stepwise mixed methods approach to PREM ED 65+ development (note the current study is within step 2).

Step 1: Conceptualising Patient Experience in the ED	Systematic Review ○ Qualitative meta-synthesis ○ Derivation of conceptual framework of patient experience of ED care [25]
Step 2: Understanding experiences specific to older adults in the ED	Qualitative study ○ Part I: Interviews with patients aged over 65 years ○ Part II: Focus groups with ED staff (professional caregivers)
Step 3: Generation and Prioritisation of Candidate Items	Consensus Setting (Nominal Groups Technique) ○ Generation of initial candidate items from existing data (Steps 1 and 2) ○ Generation and prioritisation of candidate items
Step 4: Psychometric Field Testing	Administration of draft PREM to patients ○ Confirmation of structural validity and reliability