Ergul 2011.

Methods	Study: prospective, randomised. Allocation: sealed envelopes. Blinding: yes
Participants	200 patients: 100 P / 100 C.
Interventions	Hernioplasty ATB: cefazolin 1 gr IV. MA: induction. Control: sterile saline.
Outcomes	IP=5; IC=7
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Sealed envelopes.
Allocation concealment (selection bias)	Low risk	Quote: "The anaesthesiologist administered the trial medication (antibiotic or sterile saline in coded syringes..."
Blinding (performance bias and detection bias) All outcomes	Low risk	Comment: Probably yes.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Comment: Probably yes.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Quote: "The surgeon who performed the follow‐up frequently was not the surgeon who performed the operation."