Othman 2011.

Methods	Study: prospective, randomised. Allocation: computer. Blinding: yes.
Participants	98 patients: 50 P / 48 C.
Interventions	Hernioplasty ATB: amoxicillin‐clavulanic 1.2 gr IV. MA: 30 minutes before induction. Control: sterile saline
Outcomes	IP= 4; IC= 6
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer generated list.
Allocation concealment (selection bias)	Low risk	Yes
Blinding (performance bias and detection bias) All outcomes	Low risk	Quote: "Randomization and preparation of drug and placebo were controlled by a surgery clinic nurse without the previous knowledge of the patient or surgeon."
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Yes
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not mentioned Comment: Probably not.