Table 1.
General characteristics of the included studies, by dialysis and kidney transplantion
| Geography | Dialysis (n = 33) | Kidney transplantion (n = 31) |
|---|---|---|
| Europe | 10 | 13 |
| North America | 11 | 14 |
| Others (Asia, South America, New Zealand) | 12 | 4 |
| Study design | ||
| Cross sectional | 29 | 23 |
| Cohort study | 4 | 8 |
| Study sampling method | ||
| Single-centre | 13 | 24 |
| Multicentre | 13 | 2 |
| Registry | 7 | 5 |
| Type of dialysisa | ||
| Haemodialysis | 15 | |
| Peritoneal dialysis | 10 | |
| Dialysis-modality unknown | 17 | |
| Number of participants | ||
| Cross sectional studies | ||
| Median | 233 | 139 |
| Range | 43-105,636 | 34-1278 |
| SD | 22,449 | 255 |
| Cohort studies | ||
| Median | 2103 | 1253 |
| Range | 359-4734 | 358-71,976 |
| SD | 1997 | 27,826 |
aDoes not sum up to 33 because some studies included more than one type of dialysis