Participant characteristics
| Participant ID | Gender | Ethnicity* | Age range (years) | Role | Years of experience of early-phase trials† | Clinical area of experience |
| Participant 1 | Male | Not collected | 25-34 | Professional (operational lead at a CTU) | 6–10 | Cancer |
| Participant 2 | Female | Not collected | 45–54 | Professional (doctor) | >16 | Cancer |
| Participant 3 | Female | Black African | 55–64 | Patient and public representative | Not collected | Cancer |
| Participant 4 | Female | Not collected | 45–54 | Professional (statistician) | 11–15 | Cancer |
| Participant 5 | Male | Not collected | 35–44 | Professional (statistician) | 6–10 | Cancer |
| Participant 6 | Female | British Chinese | 65–74 | Patient and public representative | Not collected | Cancer |
| Participant 7 | Female | White Canadian | 35–44 | Patient and public representative | Not collected | Neurological |
| Participant 8 | Female | Not collected | 35–44 | Professional (nurse) | 11–15 | Cancer |
*Ethnicity only collected for the patient and public representatives.
†Only collected for professional participants.
CTU, clinical trials unit.