Methodology in core outcome set (COS) development: the impact of patient interviews and using a 5-point versus a 9-point Delphi rating scale on core outcome selection in a COS development study

Table 1 Stakeholder ratings of interview derived outcomes

		Round 1		Round 2		Round 3
		Survey		Survey		Survey
Outcome	Stakeholder Group	5 PT (%)^a	9PT (%)^a	5 PT (%)^a	9PT (%)^a	5 PT (%)^a	9PT (%)^a
Pain character/type	Clinician	77	67	81	83	82	72
	Clinician/Researcher	61	40	68	43	42	29
	Patient	90	73	86	83	70	63
	Researcher	60	54	50	36	30	27
	Service Provider/Policy Maker	100	67	100	80	67	80
Need for a Mobility Aid	Clinician	81	73	84	72	75	–
	Clinician/Researcher	70	53	74	43	58	–
	Patient	85	73	79	75	60	–
	Researcher	80	46	60	64	20	–
	Service Provider/Policy Maker	100	67	67	60	100	–
Perceived Body Imbalance	Clinician	47	56	26	34	–	–
	Clinician/Researcher	48	33	26	29	–	–
	Patient	70	68	57	58	–	–
	Researcher	40	15	0	27	–	–
	Service Provider/Policy Maker	100	17	33	40	–	–
Sexual Functioning^b	Clinician	86	79	87	79	75	–
	Clinician/Researcher	70	67	84	79	68	–
	Patient	80	64	79	42	70	–
	Researcher	80	69	70	73	70	–
	Service Provider/Policy Maker	100	83	67	60	100	–
Family Life Impact^b	Clinician	93	79	97	93	93	84
	Clinician/Researcher	87	73	79	71	95	50
	Patient	90	91	100	83	100	63
	Researcher	90	85	100	73	100	64
	Service Provider/Policy Maker	100	83	100	60	100	80
Social Life Impact^b	Clinician	91	81	87	83	71	80
	Clinician/Researcher	87	67	84	64	84	50
	Patient	85	86	86	75	80	50
	Researcher	80	85	90	82	90	55
	Service Provider/Policy Maker	100	83	67	80	100	100
Emotional Symptoms^b	Clinician	74	81	74	90	75	–
	Clinician/Researcher	83	67	79	64	79	–
	Patient	80	86	79	83	80	–
	Researcher	90	77	70	55	70	–
	Service Provider/Policy Maker	60	83	67	40	33	–
Frustration	Clinician	72	67	35	55	–	–
	Clinician/Researcher	43	40	32	7	–	–
	Patient	80	82	71	67	–	–
	Researcher	40	23	40	27	–	–
	Service Provider/Policy Maker	60	50	67	60	–	–

^a% of each stakeholder groups that rated the outcome as “important” on each scale (5 point and 9 point); (−) Indicates that the outcome did not go through to the corresponding Delphi survey round and subsequently was not rated by stakeholder groups; ^b Denotes outcomes that were included in the preliminary COS after round 3 of the Delphi

ISSN: 1471-2288