Appendix 1.

MEDLINE (via Ovid) exp Clinical Trial/ exp Random Allocation/ exp Single Blind Method/ exp Double Blind Method/ (random$ adj5 trial$).tw (random$ adj5 allocation$).tw (Blind$ adj5 method$).tw or/1–8 exp Kidney Failure, Acute exp Renal Insufficiency, Acute exp Renal Dialysis exp Hemofiltration Haemofiltration.tw exp Hemodialysis Haemodialysis.tw exp Kidney Failure, Chronic or/9–16 exp Mortality/ mortalit$.tw or/17–19 8 and 17 and 20

Cochrane controlled trials Kidney Failure, Acute (MESH) Renal Insufficiency, Acute (MESH) Renal Dialysis (MESH) Haemodiafiltration (MESH) Kidney Failure, Chronic (MESH) 1 or 2 or 3 or 4 or 5 mortality (MESH) 6 and 7

EMBASE Kidney Failure, Acute Renal Insufficiency, Acute Renal Dialysis Hemofiltration Haemofiltration Haemodialysis or/1–6 Clinical trial Randomized controlled trial Random allocation Single blind method Double blind method or/8–12 Mortality 7 and 13 and 14