Ford 1986.

Methods	RCT. Individual women. 2‐arm study.
Participants	Inclusion criteria Women undergoing CS. N = 263. Exclusion criteria Women with drug allergies, antibiotics within 7 days, infection at time of enrolment, renal or hepatic dysfunction.
Interventions	Intervention: cephalosporin (B2). Cefoxitin. 2 g; after cord clamped; plus 2 additional doses (2 g) at 4 hours apart. N = 131. Comparison: penicillin (A3). Piperacillin. 2 g; after cord clamped; plus 2 additional doses (2 g) at 4 hours apart. N = 132.
Outcomes	Febrile morbidity; duration of hospitalisation; administration of systematic antibiotics post‐operatively; wound healing; infection at operation site.
Notes	Setting: UCLA Medical Center, US. Subgroups Type of CS not defined. After cord clamping. Route of administration not specified. Multiple doses. Comparison 1 (subgroup 1); 7. No information on funding source of study.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	“...randomly assigned...”.
Allocation concealment (selection bias)	Unclear risk	“...randomly assigned...”.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Not described.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described.
Incomplete outcome data (attrition bias) All outcomes	Low risk	There appeared to be no loss to follow‐up.
Selective reporting (reporting bias)	Unclear risk	We did not assess trial protocol.
Other bias	Unclear risk	No baseline imbalances on: age; weight; duration of surgery. However, other aspects of possible bias were unclear. No information on funding source of study.