We followed them using Medicare Part A claims data through 2008. We used ICD-9 codes to identify periprosthetic femoral fractures occurring from 2006–2008. We used the incidence density method ...

Between 2006 and 2008, 215 (0.7%) patients developed a periprosthetic proximal femoral fracture, for an annual incidence of 26 per 10,000 person-years. The multivariate model identified having had ...