title: Preoperative predictors of extended hospital length of stay following total knee arthroplasty.
abstract: The purpose of this study was to identify the preoperative predictors of hospital length of stay after primary total knee arthroplasty in a patient population reflecting current trends toward shorter hospitalization and using readily obtainable factors that do not require scoring systems. A single-center, multi-surgeon retrospective chart review of two hundred and sixty consecutive patients who underwent primary total knee arthroplasty was performed. The mean length of stay was 3.0 days. Among the different variables studied, increasing comorbidities, lack of adequate assistance at home, and bilateral surgery were the only multivariable significant predictors of longer length of stay. The study was adequately powered for statistical analyses and the concordance index of the multivariable logistic regression model was 0.815.
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.
authors.forename: Mohamad J
authors.initials: MJ
authors.lastname: Halawi
authors.affiliation: Duke University School of Medicine, Durham, North Carolina.
authors.forename: Tyler J
authors.initials: TJ
authors.lastname: Vovos
authors.affiliation: Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina.
authors.forename: Cindy L
authors.initials: CL
authors.lastname: Green
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.
authors.forename: Samuel S
authors.initials: SS
authors.lastname: Wellman
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.
authors.forename: David E
authors.initials: DE
authors.lastname: Attarian
authors.affiliation: Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Bolognesi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods / Q000706:statistics & numerical data*; D015897:Comorbidity; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D007902:Length of Stay / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D057234:Preoperative Period; D012189:Retrospective Studies; D012307:Risk Factors; D012944:Social Support
keywords: arthroplasty; assistance at home; comorbidities; knee; length of stay; preoperative predictors