Results
98 of 276 corresponding authors completed the survey (average response rate of 36% across all surveys). Of these, 89 respondents indicated that their trial had completed. Ninety per cent of respondents who were corresponding authors of completed pilot trials stated that their pilot trial was either feasible (42/89, 47%) or feasible with changes to the trial design (38/89, 43%), yet only 66% (59/89) reported the intention to conduct a future definitive trial. Availability of funding for a future definitive trial and changing priorities of the Chief Investigator were the most common barriers to progression identified. Qualitative research findings was the most frequent factor considered both by corresponding authors who reported and who did not report progression criteria when determining trial feasibility.