Table 2.

Initial survey respondent roles

	Number	Percentage
Which one of the following best describes your main role in a randomised trial?
A researcher involved in aspects of the trial other than retention	96	22
A principal investigator	95	21
A person invited to take part in a trial	70	15
A trial methodologist (someone who specialises in the methods of how trials are designed, run, analysed, and reported)	70	15
A researcher involved in encouraging people to stay involved in trials	65	14
A patient, carer, or public contributor to the design or running of trials	22	5
Other (please describe)	19	4
A parent or carer of a person invited to take part in a trial	10	2
No response	9	2
Total	456	100
Where do you usually live?
England	281	62
Scotland	61	14
Republic of Ireland	51	11
Wales	33	7
Other	15	3
Northern Ireland	11	2
No response	4	1
Total	456	100