Abstract
The objective of this study was to determine if high-dose antibiotic prophylaxis with cefazolin decreases the risk of surgical site infection (SSI) after a cesarean delivery. We performed a retrospective cohort study of women who underwent a cesarean section. Two preoperative antibiotic regimens were compared: low dose versus high dose. The primary outcome was SSI. A sample size of 343 patients per group was calculated for a 50% reduction in risk for SSI. Seven hundred and thirty women were included with an incidence of SSI of 5%. Women who received the high-dose antibiotic regimen had lower rates of risk factors for SSI. The only exception was skin incision closure with staples. The rate of SSI did not differ between the low-dose and high-dose groups, even after adjusting for confounding variables [aOR 1.78, 95% CI (0.82-3.9)]. Higher doses of antibiotic prophylaxis did not decrease the rates of SSI after cesarean delivery.
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