In three of randomized clinical trials, APD, APD did not differ from CAPD with respect to mortality (RR 1.49, 95% CI 0.51 to 4.37), risk of peritonitis(RR 0.75, 95% CI 0.50 to 1.11), switching from original PD modality to a different dialysis modality(RR 0.50, 95% CI 0.25 to 1.02), hernias(RR 1.26, 95% CI 0.32 to 5.01), PD fluid leaks(RR 1.06, 95% CI 0.11 to 9.83), PD catheter removal ( RR 0.64, 95% CI 0.27 to 1.48) or hospital admissions (RR0.96, 95% CI 0.43 to 2.17). In addition APD has potential disadvantages compared with CAPD like a possible faster in residual renal function, less sodium removal and more peritoneal protein loss and more expensive than CAPD. All of three large cohorts, NECOSAD, USRDS and ANZDATA showed that the risk of technical failure was not different between APD and CAPD but similar.