Sziller 1994.

Methods	RCT; 2 parallel groups. Unit of randomization: individual.
Participants	Dates of data collection: September 1990 to April 1991. Setting: Budapest, Hungary. Inclusion criteria: women who had opted for elective CS before onset of labor (definition not provided; indications included chronic fetal distress, breech position, placenta previa/placental abruption, prior uterine surgery; classified as elective for this review). Exclusion criteria: symptoms of infection prior to surgery; any illness that increased risk of infection (e.g. diabetes); penicillin allergy.
Interventions	Intervention 1: unasyn (1000 mg ampicillin/500 mg sulbactam) IV after clamping of the cord, and 6 and 12 hrs later; N = 60. Intervention 2: no treatment; N = 44.
Outcomes	Fever (categorized as mild [up to 37.5°C after the 1st 24 hrs lasting for at least 2 days (treatment n = 4 vs no treatment n = 5)]; moderate [> 38°C for at least 2 days (n = 0 vs n = 2)]; severe [> 38°C lasting > 3 days (n = 0 vs n = 2)];wound infection (induration of the abdominal incision, serosanguinous or purulent discharge, dehiscence of the wound); endometritis (fever plus lower abdominal pain, uterine tenderness, odorous discharge from the uterine cavity); UTI (pathogenic bacteria from mid‐stream urine); additional antibiotic treatment (treatment group n = 6 vs no treatment n = 13).
Notes	Translated from Hungarian. Class of antibiotic: beta‐lactam/beta‐lactamase inhibitor combination. Subgroups: elective CS; after cord clamping. No significant differences between groups for age, indications for CS, gestational age, birthweight and previous CS.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "Random table".
Allocation concealment (selection bias)	Unclear risk	Comment: no information provided.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: no loss to follow‐up reported; no explanation for difference in numbers between groups (60 vs 44).
Selective reporting (reporting bias)	Unclear risk	Comment: insufficient information provided to judge.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: no blinding, not placebo‐controlled.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Comment: probably outcome assessment was not blinded.
Other bias	Low risk	Comment: no other sources of bias identified.