Table 4 Evaluation of participant’s engagement with the study
Contents | N | % |
|---|---|---|
All participants | 220 | – |
Questioner (conducted after answering cTTO and VAS) | ||
 Q1, ‘I found it easy to imagine the scenarios I was asked’ | ||
  Strongly agree | 101 | 45.9% |
  Agree | 110 | 50.0% |
  Disagree | 8 | 3.6% |
  Strongly disagree | 1 | 0.5% |
 Q2, ‘I found it easy to tell the difference between the lives I was asked to think about’ | ||
  Strongly agree | 147 | 66.8% |
  Agree | 71 | 32.3% |
  Disagree | 2 | 0.9% |
  Strongly disagree | 0 | 0.0% |
 Q3, ‘I found it difficult to decide on my answers to the questions’ | ||
  Strongly agree | 57 | 25.9% |
  Agree | 117 | 53.2% |
  Disagree | 44 | 20.0% |
  Strongly disagree | 2 | 0.9% |
Analysis population | 201 | – |
 Participants evaluated utility value of PD > SD | 1 | 0.5% |
 Time per cTTO task in seconds, median (IQR) | 94 (74–125) | |
 Times of Trade-offs in cTTO, mean (SD) | 5.28 (1.96) | |
cTTO tasks | 1827 | – |
 Utility score = −1 | 90 | 4.9% |
 Utility score = 0 | 238 | 13.0% |
 Utility score = 1 | 3 | 0.2% |