Bhattacharjee 2013.

Methods	Randomized controlled trial.
Participants	953 pregnant women, more than 34 weeks of gestation, requiring cesarean deliveries. Excluded:obstetric complications (pre‐eclampsia, antepartum hemorrhage, etc), renal disease, heart disease, diabetes mellitus, febrile during or prior to screening, ruptured membranes with or without antibiotic prophylaxis, any exposure to antibiotic during past 1 week, obstetrical indication for emergency cesarean delivery during labor, penicillin or cephalosporin allergy.
Interventions	Group A received prophylactic single‐dose intravenous antibiotic (2 g ceftriaxone mixed with 10 mL) prior to incision and intravenous placebo (10 mL water) after cord clamp (n = 476). Group B received intravenous placebo (10 mL water) prior to incision and intravenous ceftriaxone 2 g in 10 mL after cord clamp (n = 477).
Outcomes	Primary outcome: postoperative maternal infectious morbidity. Secondary outcomes: neonatal complications, postoperative hospital stay of mother and stay of neonates at NICU (days).
Notes	July 2010 to December 2011, at 2 teaching hospitals in West Bengal India.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	"A computer‐generated randomisation sequence" was used.
Allocation concealment (selection bias)	Low risk	"The allocation was concealed in sealed, sequentially numbered, brown envelopes (opaque), which had been prepared by the statistician of each centre and handed over to the sister‐in‐charge of the operation theatre" was used.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	"The drugs were supplied in small sealed bags", "Both vials were identical", conducted double‐blinded manner.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	"Postoperative follow‐up was done by resident doctors who were blinded to the patients' and babies' identity." Outcome assessor was blinded.
Incomplete outcome data (attrition bias) All outcomes	Low risk	All the women randomized included in the analysis (intention‐to‐treat analysis), however, the number of women who completed the intervention group was n = 458 (96.2%), and in the control group was n = 456 (95.6%).
Selective reporting (reporting bias)	Low risk	Prespecified outcomes stated.
Other bias	Low risk	No other bias evident.