Gaspard 1972.

Methods	Study design: randomised, not blinded Method of randomisation: states random, method unknown Losses to follow up: no losses to follow up
Participants	Country: USA Number of participants: 43 (29 participants with IC and 14 with rest pain) Sex: male and female Age: mean age 56.5 years Inclusion criteria: individuals requiring aorto‐ilio‐femoral reconstruction Exclusion criteria: individuals with disease confined to the aorto‐iliac segment
Interventions	Treatment: bypass graft using a Dacron bifurcated prosthesis, either woven or knitted Control: thromboendarterectomy Duration: postoperative period only
Outcomes	Mortality Treatment failure Complications of surgery/intervention
Notes	No source of funding/sponsorship was reported.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: “randomly assigned”. Comment: Insufficient information about the random generation process.
Allocation concealment (selection bias)	Unclear risk	Insufficient information about allocation concealment.
Blinding (performance bias and detection bias) All outcomes	Low risk	See below.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Probably no blinding because of the nature of the operative procedure, but the review authors judged that the outcome and the outcome measurement were not likely to be influenced by lack of blinding.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Insufficient information available.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No apparent loss of data.
Selective reporting (reporting bias)	High risk	Outcome measures not clearly defined and the study failed to include key outcomes.
Other bias	Low risk	No other source of bias was identified.