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Table 3 Incidence of septic knee utilizing the Wilson Confidence Interval (95% Confidence Interval) for all patients treated with retrograde intramedullary nail and retrograde nail treatment separated into those patients with open and closed femur fractures

From: Risk of septic knee following retrograde intramedullary nailing of open and closed femur fractures

  Patients Wilson Confidence Interval For Septic Knee
Total 185 2%
Open 38 9%
Closed 143 2.60%