Stegmayr 2005a.

Methods	Study design: parallel RCT Study time frame/recruitment period: not reported Follow‐up period: not reported
Participants	Country: Sweden Setting: single centre All patients selected for PD Number: treatment group (10); control group (14) Mean age ± SD (years): not reported separately Sex (M/F): not reported Diabetes: not reported Exclusion criteria: not reported
Interventions	Treatment group Straight catheter Control group Coiled catheter
Outcomes	Catheter outflow failure Catheter removal Peritonitis
Notes	Initially planned to recruit 50 patients. The study was interrupted because the analysis showed a significantly higher frequency of catheter exchanges due to drainage dysfunction and malposition among coiled catheters Funding source: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information to permit judgement
Allocation concealment (selection bias)	Unclear risk	Insufficient information to permit judgement
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)	High risk	Few outcomes were reported
Other bias	Unclear risk	Insufficient information to permit judgement