Johnson 2006.

Methods	Study design: parallel RCT Study time frame/recruitment period: February 2003 to February 2006 Follow‐up period: All patients were followed up until death, kidney transplantation, completion of PD therapy, or the end of the study on 24 March 2006, whichever came first
Participants	Country: Australia Setting: multicentre (2 sites) Adults patients with ESKD (stage 5 CKD) who required insertion of a Tenckhoff catheter for PD Number: treatment group (70); control group (62) Mean age ± SD (years): treatment group (56.3 ± 15.7); control group (57.6 ± 15.7) Sex (M/F): treatment group (40/30); control group (42/30) Diabetes: treatment group (29/70); control group (19/62) Exclusion criteria: history of psychological illness or condition that interfered with the ability to understand or comply with requirements of the study
Interventions	Treatment group Straight Tenckhoff catheter Control group Coiled Tenckhoff catheter
Outcomes	Catheter malposition Catheter associated infection (peritonitis, exit‐site infection) Technique failure Death (all causes)
Notes	Stop of end points: all patients were followed up until death, kidney transplantation, completion of PD therapy, or the end of the study on March 24, 2006, whichever came first Funding source: none
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated random number list with randomisation blocks of 20
Allocation concealment (selection bias)	Low risk	Random number with randomisation blocks of 20
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Insufficient information to permit judgement
Incomplete outcome data (attrition bias) All outcomes	Low risk	No dropouts
Selective reporting (reporting bias)	Low risk	Low risk, most outcomes were reported
Other bias	High risk	Unequal baseline characteristics