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

MacGregor 1992.

Methods Randomized trial
 Study period: not stated
Participants Inclusion criteria: postcesarean at least 12 hours postoperative who had received 3 doses of cefazolin as prophylaxis, and who presented with uterine tenderness, temperature at least 38.3 °C on 1 occasion or at least 38 °C on 2 occasions at least 6 hours apart, and no other obvious source of infection
 Setting: Philadelphia, Pennsylvania, USA
 Number of participants: n = 140
Interventions Cefotetan 2 g iv every 12 hours (plus placebo doses; n = 66) vs cefoxitin 2 g iv every 6 hours (n = 63)
Outcomes Therapeutic failure (defined as a lack of decrease in temperature and uterine tenderness within 48 hours of therapy)
 Incidence of enterococcal bacteremia (considered automatically as a treatment failure): cefotetan n = 3; cefoxitin n = 1
 Relapse (defined as those women meeting criteria for cure with subsequent wound infection, abscess, recurrent endometritis within 6 weeks) ‐ 1 in each group
 Complications (wound infection)
 Diarrhea
Notes 11 women were excluded due to protocol violations (4 from cefotetan group, 7 from the cefoxitin group)
 Pharmaceutical sponsorship ‐ probable
 All participants were postcesarean birth
Risk of bias
Bias Authors' judgement Support for judgement
Random sequence generation (selection bias) Low risk Computerized randomization schedule
Allocation concealment (selection bias) Low risk Pharmacy controlled randomization
Blinding of participants and personnel (performance bias) 
 All outcomes Low risk Double blinded. All doses were identical in appearance and were dispensed from the pharmacy
Blinding of outcome assessment (detection bias) 
 All outcomes Low risk All clinical decisions made by the primary physicians, not by the study team
Incomplete outcome data (attrition bias) 
 All outcomes Low risk 11 (7.8%) women were excluded due to protocol violations (4 from cefotetan group, 7 from the cefoxitin group)
Selective reporting (reporting bias) Unclear risk The protocol is not available, insufficient information to permit judgment
Other bias Low risk The study appears to be free of other sources of bias