Gledhill 1983.

Methods	Clinical controlled trial. Allocation according to the month of their day of birth. Blinding unclear.
Participants	102 enrolled in the study. mean: Treatment group: 24,9, placebo group: 26,2 Patients with weight less than 25 kg, pregnant women or steroid treatment were excluded before randomsation.
Interventions	Treatment group: Cefamandole 2 g i.v inter‐operatively. Placebo group: Nothing.
Outcomes	Wound infection (Not defined).
Notes	Alle patients received drain treatment.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	High risk	C ‐ Inadequate