Gloor 1996.

Methods	Site: Ilio or femoral to AK popliteal Study design: single‐centre RCT Method of randomisation: not explicitly stated Blinding: stated to be single‐blind Exclusions post randomisation: not stated Losses to follow up: none Protocol violations: none stated
Participants	Country: France Setting: hospital No. of participants: 18 (20 limbs; 10 PUR graft, 10 Dacron) Age (mean): PUR group: 70.7 years; Dacron: 70.5 years Sex: Overall 13 men, 7 women; PUR group: 6 men, 4 women; Dacron group: 7 men, 3 women Inclusion criteria: peripheral arterial occlusion of lower limb graded Fontaine stage IIb‐IV requiring AK synthetic ilio‐ or femoro‐popliteal bypass Exclusion criteria: obesity, emergency surgery, critical threat to limb
Interventions	Iliac or Femoral to AK popliteal bypass graft with either 6 mm PUR or 6 mm Dacron
Outcomes	Primary and secondary patency, complications in first 30 days, reintervention rate
Notes	Clear anticoagulation/antiplatelet protocol
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of randomisation not stated
Allocation concealment (selection bias)	Unclear risk	Timing of randomisation not declared
Blinding of participants and personnel (performance bias) All outcomes	High risk	Operative blinding impossible in this type of trial, though participants were blinded
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Outcome assessors not obviously blinded
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No PRISMA flow chart, no mention of patients excluded prior to randomisation or after randomisation
Selective reporting (reporting bias)	Unclear risk	Primary and secondary patency as well as reinterventions reported, but no complications in first 30 days which did not lead to reintervention mentioned
Other bias	Low risk	Clear anticoagulation and antiplatelet protocol