• Marjo E E van Kasteren, Judith Manniën, Alewijn Ott, Bart-Jan Kullberg, Annette S de Boer, and Inge C Gyssens.
• Department of Internal Medicine, Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands. M.v.Kasteren@elisabeth.nl
• Clin. Infect. Dis. 2007 Apr 1;44(7):921-7.

BackgroundSurgical site infections (SSIs) following total hip arthroplasty can lead to prolonged hospitalization, increased morbidity and mortality, and high costs. This article analyzes the effect of various parameters of surgical antibiotic prophylaxis on the risk of SSI following total hip arthroplasty.MethodsData about SSI and potential prophylaxis-, patient-, and procedure-related risk factors were prospectively collected for 1922 patients who underwent elective total hip arthroplasty in 11 hospitals that participated in the Dutch intervention project, Surgical Prophylaxis and Surveillance. Multivariate logistic regression analysis was performed to correct for random variation among hospitals.ResultsSSIs (superficial and deep) occurred in 50 patients (2.6%). The highest odds ratios for SSI were found in patients who received prophylaxis after incision (2.8, 95% confidence interval [CI], 0.9-8.6; P=.07), had an American Society of Anesthesiology score that was >2 (2.8, 95% CI, 0.8-9.2; P=.09), and experienced a duration of surgery that was >75th percentile (2.5; 95% CI, 1.1-5.8; P=.04). Prolonged prophylaxis after the end of surgery and the use of antibiotic-impregnated cement did not contribute to fewer SSIs in this study.ConclusionsThis study suggests that intervention programs in search of amendable factors to prevent SSI should focus on timely administration of antibiotic prophylaxis.

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