Table 2.

Characteristics of questionnaire participants

	PPI Contributors n = 68		Researchers n = 39
	n	%	n	%
Gender
Male	23	34	12	31
Female	43	63	27	69
Indeterminate	2	3	0	0
Total	68	100	39	100
Age group
16‐25	2	3	0	0
26‐55	15	22	28	72
56‐65	17	25	9	23
66‐75	21	31	2	5
76+	13	19	0	0
Total	68	100	39	100
Employment
Employed	16	24	‐	‐
Clinician	‐	‐	8	21
Chief investigator	‐	‐	19	49
Researcher	‐	‐	19	49
Unemployed	1	2	‐	‐
Student	2	3	1	3
Retired	45	66	‐	‐
Carer	3	4	‐	‐
Other (more than one reply possible; percentages add up to more than 100)	6a	9	5b	13
Length of experience of PPI
0‐3years	31	46	17	44
3‐5years	12	18	5	13
5‐10years	11	16	11	28
10years +	13	19	6	15
Total	68	100	39	100
Missing	1	2	‐	‐

^aThe PPI “other” category included health reasons for not working (n = 4), voluntary work or PPI.

^bThe researcher “other” category included Principal investigator, research nurse, sponsor, lecturer.