Stegmayr 2015.

Methods	Study design: parallel RCT Study time frame/recruitment period: February 2007 to June 2013 Follow‐up period: median follow‐up was 10 months (range 1 to 76 months; mean 15 ± 17 months)
Participants	Country: Sweden Setting: single centre All patients accepted for PD by physician Number: treatment group (29); control group (32) Mean age ± SD (years): treatment group (58 ± 13); control group (60 ± 18) Sex (M/F): treatment group (20/9); control group (17/15) Diabetes: treatment group (7/29); control group (12/32) Exclusion criteria: once the patient was accepted for PD by the physician in charge there were no exclusion criteria for randomisation
Interventions	Treatment group Double cuffed Wolfram self‐locating catheter Control group Double cuffed Tenckhoff catheter
Outcomes	Catheter outflow failure Early and late leak Death
Notes	Funding source: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "A peritoneal dialysis nurse made randomization from envelopes and provided the surgeon with the respective catheter"
Allocation concealment (selection bias)	Unclear risk	Quote: "A peritoneal dialysis nurse made randomization from envelopes and provided the surgeon with the respective catheter"
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	High risk	High dropout; loss to follow‐up: died (7/61), transfer to HD (20/61), transplant (15/61)
Selective reporting (reporting bias)	High risk	Not all the outcomes were reported
Other bias	Unclear risk	Significantly large number of patients from treatment group dropped out due to transplant