Adair 1999.

Methods	No information of randomisation, allocation concealment and blinding.
Participants	Intervention group: 123 pregnant women (mean age 24.8, SD 3.7), (mean gestational age 39.8, SD 1.9) with intrapartum diagnosis of MSAF. Control group: 119 pregnant women (mean age 23.4, SD 3.4), (mean gestational age 39.8, SD 1.1) with intrapartum diagnosis of MSAF. Inclusion criteria: absence of obvious infection, temperature < 100 F, MSAF passage and willingness to participate. Exclusion criteria: fetal heart rate > 180, penicillin or cephalosporin allergy.
Interventions	Intervention: ampicillin‐sulbactam 3.0 g intravenous. Control: normal saline.
Outcomes	Intra‐ amniotic infection.
Notes	Data from conference abstract.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described.
Allocation concealment (selection bias)	Unclear risk	Not described.
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	No loss of follow up.
Selective reporting (reporting bias)	Unclear risk	Not described.
Other bias	Unclear risk	Not described.

GA: gestational age
 IV: intravenous
 MSAF: meconium‐stained amniotic fluid
 NICU: neonatal intensive care unit
 RCT: randomised controlled trial
 SD: standard deviation