Study characteristics
| Study characteristic | N (%) (n=180) |
| Sponsor | |
| Commercial | 90 (50.0) |
| Non-commercial | 81 (45.0) |
| Unknown | 9 (5.0) |
| Type of study | |
| Parallel group | 164 (91.1) |
| Cluster | 11 (6.1) |
| Crossover | 5 (2.8) |
| Multicountry | 45 (25.0) |
| Number of countries in multicountry studies—median (IQR) | 7 (3–11) |
| Included modality | |
| Haemodialysis | 147 (81.7) |
| Both hemodialysis and peritoneal dialysis | 17 (9.4) |
| Peritoneal dialysis | 16 (8.9) |
| Number of participants – median (IQR) | 208 (148–334) |
| Number of sites – median (IQR) | 15 (5–38) |
| Planned duration of follow-up (months) – median (IQR) | 7 (3–12) |