| Gender | Female | 8 | 2 |
| | Male | 7 | 11 |
| Ethnicity (free text) | White, European | 1 | 0 |
| | White | 3 | 3 |
| | White British | 8 | 7 |
| | English | 1 | 0 |
| | Asian | 1 | 1 |
| | British | 1 | 1 |
| | Caucasian | 0 | 1 |
| Age (years) | 30 or younger | 1 | 1 |
| | 31–35 | 0 | 3 |
| | 36–40 | 5 | 2 |
| | 41–45 | 0 | 2 |
| | 46–50 | 1 | 2 |
| | Older than 50 | 8 | 3 |
| Highest academic qualification | Doctorate | 1 | 8 |
| | Post-graduate degree (Masters) | 2 | 5 |
| | Registered nurse & registered midwife | 1 | 0 |
| | Undergraduate degree | 6 | 0 |
| | Undergraduate degree, teaching certificate | 1 | 0 |
| | General Certificate of Secondary Education | 1 | 0 |
| | NA | 3 | 0 |
| Have you ever participated in a clinical trial? | No | 9 | - |
| | Yes | 6 | - |
| Have you ever been a member of a public involvement group? | No | 5 | - |
| | Yes | 10 | - |
| Experience in clinical trials research (years) | 11–15 years | - | 5 |
| | 16–20 years | - | 1 |
| | 5–10 years | - | 1 |
| | Less than 5 years | - | 2 |
| | More than 20 years | - | 3 |
| | NA | - | 1 |
| Current employment sector | Private | - | 6 |
| | Public | - | 7 |
| Location | United Kingdom | - | 11 |
| | United States of America | - | 2 |
| Area of expertise (can choose multiple) | Clinician | - | 1 |
| | Health economics | - | 8 |
| | Health services research | - | 1 |
| | Value of information analysis | - | 2 |
| | Adaptive designs | - | 3 |
| | Clinical trial management | - | 1 |
| | Statistics | - | 5 |
