Voto 1986.

Methods	RCT. Individual women. 2‐arm study.
Participants	Inclusion criteria Women requiring a CS. N = 80. Exclusion criteria None specified.
Interventions	Intervention: cephalosporin (B2). Cefoxitin. 2 g, IV, every 4 hours, after cord clamping. N = 39 with analysis on 37 (95%) Comparison: penicillin (A4). Ampicillin. 2 g orally with daily doses divided into 4 doses, for 7 days. N = 40 with analysis on 17 (42%).
Outcomes	Analyses of cultures at endocervix, skin and tissue and urine.
Notes	Setting: maternity ward, the Hospital Juan A. Fernandez, Buenos Aires, Argentina. Translation: from Portuguese. Subgroups Type of CS not defined. After cord clamping. IV administration of cephalosporin and oral administration of penicillin. Multiple doses. We have not included data from this study because of the high loss of data from the penicillin group (58%). The authors concluded that the use of cefoxitin was efficacious in preventing infection after CS. No information about funding source of study.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	“Women were divided, at random, into two groups of which one was administered cefoxitin and the other ampicillin.”
Allocation concealment (selection bias)	Unclear risk	No information provided.
Blinding of participants and personnel (performance bias) All outcomes	High risk	No blinding.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No information provided.
Incomplete outcome data (attrition bias) All outcomes	High risk	Of the 80 women included (GpA = 39 and GpB = 40) authors only report data on GpA = 37 and GpB = 17. Suggest loss too high and very uneven, so groups are not randomised groups. We have not used data in the meta‐analyses.
Selective reporting (reporting bias)	Unclear risk	The study protocol was unavailable.
Other bias	Unclear risk	No information on baseline characteristics and other possible biases unclear. No information about funding source of study.