Higher body mass index is not associated with worse pain outcomes after primary or revision total knee arthroplasty.

Academic Article


  • We assessed whether higher body mass index (BMI) is associated with higher risk of moderate-severe knee pain 2 and 5 years after primary or revision total knee arthroplasty (TKA).We adjusted for sex, age, comorbidity, operative diagnosis, and implant fixation in multivariable logistic regression. Body mass index (reference, b 25 kg/m2) was not associated with moderate severe knee pain at 2 years post primary TKA (odds ratio [95% confidence interval], 25-29.9, 1.02[0.75-1.39], P = .90; 30-34.9, 0.93 [0.65-1.34], P = .71; 35-39.9, 1.16 [0.77-1.74], P = .47; ≥ 40,1.09 [0.69-1.73], [all P values ≥ .47]). Similarly, BMI was not associated with moderate-severe pain at 5-year primary TKA and at 2-year and 5-year revision TKA follow-up. Lack of association of higher BMI with poor pain outcomes post-TKA implies that TKA should not be denied to obese patients for fear of suboptimal outcomes.
  • Published In


  • Age Factors, Aged, Arthralgia, Arthroplasty, Replacement, Knee, Body Mass Index, Comorbidity, Female, Follow-Up Studies, Humans, Knee Joint, Male, Middle Aged, Obesity, Osteoarthritis, Knee, Prospective Studies, Reoperation, Severity of Illness Index, Sex Factors, Time Factors, Treatment Outcome
  • Digital Object Identifier (doi)

    Author List

  • Singh JA; Gabriel SE; Lewallen DG
  • Start Page

  • 366
  • End Page

  • 374.e1
  • Volume

  • 26
  • Issue

  • 3