Table 1

PROMs selected for discussion in the focus groups

Name of instrument and reference	Main concept	Use in FGs
The Health Assessment Questionnaire27	Functioning	RA/JIA/Still’s disease, PsA
Bath Ankylosing Spondylitis Functional Index28	Functioning	SpA
Single item scale for assessing pain43 shown as Visual Analogue Scale and Numeric Rating Scale 0–10	Pain	All FGs
Single item scale for assessing disease activity—Patient Global Assessment33 two differently phrased questions were shown ‘Considering all the ways in which your arthritis may affect you at this time, please make a mark below to show how you are doing’, and ‘How would you rate your disease activity today?’	Disease activity	All FGs
Functional Assessment of Chronic Illness Therapy-Fatigue44	Fatigue	All FGs
The 36-Item Short Form Health Survey45	General health	All FGs

FGs, focus groups; JIA, juvenile idiopathic arthritis; PROMs, patient-reported outcome measures; PsA, psoriatic arthritis; RA, rheumatoid arthritis; SpA, spondyloarthritis.