Merrikhi 2014.

Methods	Study design: parallel RCT Study time frame/recruitment period: 2010 to 2011 Follow‐up period: 2 months
Participants	Country: Iran Setting: single centre Patients < 15 years who will be receiving PD and have family support Number: treatment group (18); control group (17) Mean age ± SD (years): treatment group (6.77 ± 4.87); control group (6.38 ± 4.91) Sex (M/F): treatment group (9/9); control group (12/5) Diabetes: not reported Exclusion criteria: history of prior major abdominal surgery; ventral or inguinal hernia; BMI ≥ 35 kg/m2
Interventions	Treatment group Percutaneous placement by 1 cm transverse incision on the skin just below the umbilicus Control group Open placement by making a left 3to 4 cm paramedian incision approximately 1 to 2 cm superior to the umbilicus
Outcomes	Catheter‐related infection: peritonitis, exit‐site infection Mechanical complication of catheter Outflow failure of catheter
Notes	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 loss to follow‐up
Selective reporting (reporting bias)	Low risk	Study was registered with Iranian Registry of clinical trials
Other bias	Unclear risk	Insufficient information to permit judgement