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. 2015 Feb 2;2015(2):CD001067. doi: 10.1002/14651858.CD001067.pub3

Soper 1992.

Methods Randomized trial
 Study period: not given
Participants Inclusion criteria: women with postpartum endometritis based on 2 temperatures of more than 38.6 °C at least 4 hours apart or a single temperature of more than 38.6 °C during the first 24 hours after delivery; uterine tenderness; and no other apparent source of fever
 Setting: Medical College of VIrgina Hospitals, Richmond, Virginia, USA
 Number of participants: n = 81
Interventions Ceftizoxime 2 g iv every 12 hours (n = 43) vs cefoxitin 2 g every 6 hours (n = 38)
Outcomes Treatment failure
 Complications including phlebitis, wound infection, allergic reactions, and diarrhea
Notes Cesarean births could have received cefazolin antibiotic prophylaxis during surgery (n = 73)
 Vaginal births (n = 8)
 Pharmaceutical sponsorship ‐ explicit
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Unclear risk States “Patients were randomly assigned” no further description
Allocation concealment (selection bias) Unclear risk Not stated
Blinding of participants and personnel (performance bias) 
 All outcomes Low risk States “Double blinded” ”physicians did not know which antibiotic was being used.”
Blinding of outcome assessment (detection bias) 
 All outcomes Low risk States ”physicians did not know which antibiotic was being used.”
Incomplete outcome data (attrition bias) 
 All outcomes Unclear risk Drop‐outs unclear
Selective reporting (reporting bias) Unclear risk The protocol is not available, insufficient information to permit judgment
Other bias High risk Pharmaceutical sponsorship ‐ evident