Participant demographic characteristics (n=58)
| Characteristics | N (%) |
| Sex | |
| Men | 43 (74) |
| Women | 15 (26) |
| Age group (years) | |
| 30–39 | 14 (24) |
| 40–49 | 20 (34) |
| 50–59 | 18 (31) |
| ≥60–69 | 6 (10) |
| Years of experience in haemodialysis | |
| ≤10 | 14 (24) |
| 11–20 | 22 (38) |
| >20 | 22 (38) |
| Country | |
| UK | 14 (24) |
| Australia | 13 (22) |
| Belgium | 8 (14) |
| USA | 7 (12) |
| Austria | 5 (7) |
| Canada | 4 (7) |
| Germany | 4 (7) |
| Singapore | 2 (3) |
| New Zealand | 1 (2) |
| Size of dialysis unit—number of current patients on haemodialysis | |
| 1–50 | 5 (7) |
| 51–100 | 5 (7) |
| 101–200 | 10 (17) |
| 201–300 | 9 (16) |
| 301–400 | 4 (7) |
| >400 | 25 (43) |
| Number of trials as investigator | |
| 0 | 16 (28) |
| 1–5 | 18 (30) |
| 6–10 | 13 (22) |
| 11–15 | 6 (10) |
| >15 | 5 (9) |