Taylor 1997.

Methods	Study: multicenter, prospective, randomised. Allocation: computer. Blinding: yes.
Participants	269 patients: 136 P / 133 C.
Interventions	Herniorrhaphy ATB: Amoxicillin‐clavulanic 1,2 gr IV. MA: before the incision. Control: placebo.
Outcomes	IP=1; IC= 12
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer generated code in blocks of four.
Allocation concealment (selection bias)	High risk
Blinding (performance bias and detection bias) All outcomes	High risk	Quote in abstract: "We have conducted a randomised multicenter, double‐blind prospective trial...". Comment: Information about concealment not provided.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: Information about concealment not provided.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not mentioned