Krotenberg R, Stitik T, Johnston MV: Incidence of dislocation following hip arthroplasty for patients in the rehabilitation setting.Am J Phys Med Rehabil1995;74:444—447Dislocation of a hip arthroplasty prosthesis is the most common serious complication after hip replacement. It is especially important in the rehabilitation setting because it is potentially preventable. The purpose of this study was to investigate differences in dislocation rates between rehabilitation and acute hospital settings. A retrospective chart review of total hip and bipolar hemiarthroplasty patients admitted to three rehabilitation hospitals was performed. Dislocation rates among 825 rehabilitation patients who met study eligibility criteria were compared with rates found among 5352 acute care patients reported in the published literature. The rate of hip dislocation among total hip replacement patients in rehabilitation hospitals was not significantly higher than that in acute settings (2.17%v1.27%). Among bipolar hemiarthroplasty patients, however, the dislocation rate was markedly and significantly lower in rehabilitation than in acute settings (0%v1.95%,P<0.01). Possible reasons for these results are discussed. Further research is needed to identify risk factors more precisely for prosthesis dislocation.