title: Obese patients undergoing total knee arthroplasty have distinct preoperative characteristics: an institutional study of 4718 patients.
abstract: Obesity affects a disproportionate proportion of total knee arthroplasty (TKA) patients. Our study explores pre-operative characteristics between obese and non-obese patients undergoing TKA surgery. A cohort of 4718 osteoarthritic patients, undergoing primary TKA, was studied. Patients were stratified according to BMI classes. Each class was compared in terms of age, race, gender, level of education, insurance status, pre-operative WOMAC, SF-36, and Elixhauser comorbidities. There was a positive relationship between BMI and female gender, non-white race, Medicaid, private insurance, and self-pay. A negative relationship was observed between BMI and age, Medicare, WOMAC and SF-36. Obese TKA candidates differ from their non-obese counterparts in a number of demographic, socioeconomic, and clinical characteristics.
authors.affiliation: Department of Orthopaedic Surgery, Hospital for Special Surgery and Weill Medical College of Cornell University, NY, USA.
authors.forename: Ettore
authors.initials: E
authors.lastname: Vulcano
authors.forename: Yuo-Yu
authors.initials: YY
authors.lastname: Lee
authors.forename: Tarek
authors.initials: T
authors.lastname: Yamany
authors.forename: Stephen
authors.initials: S
authors.lastname: Lyman
authors.forename: Alejandro González Della
authors.initials: AG
authors.lastname: Valle
mesh_terms: D000367:Age Factors; D000368:Aged; D000704:Analysis of Variance; D019645:Arthroplasty, Replacement, Knee; D015992:Body Mass Index; D016009:Chi-Square Distribution; D015897:Comorbidity; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D019458:Insurance Coverage / Q000706:statistics & numerical data; D008297:Male; D008484:Medicaid; D008875:Middle Aged; D009765:Obesity / Q000150:complications* / Q000208:ethnology; D020370:Osteoarthritis, Knee / Q000601:surgery*; D011446:Prospective Studies; D012042:Registries; D012307:Risk Factors; D012737:Sex Factors; D014481:United States
keywords: BMI; SF-36; TKA; WOMAC; obesity