Table 1.

Sample for Delphi study of underpinning principles.

Round	Professionals	Patients or carers	Total attempting at least one item
Round 1	27 doctors, 4 nurses (2 of whom added that they were nurse practitioners), 1 physician associate, 2 physiotherapists, 1 health policy researcher, 1 from patient advocacy organization (total 36)	14	50
Round 2	22 doctors, 3 nurse practitioners, 1 physician associate, 1 physio-therapist, 1 medicolegal consultant, 1 policy researcher (total 29)	11	40
Rounds 3 and 4	21 doctors, 1 nurse practitioner, 1 physician associate, 1 physio-therapist, 1 medicolegal consultant, 1 policy researcher (total 26)	11	37