The impact of body mass index on patient reported outcome measures (PROMs) and complications following primary hip arthroplasty

J Arthroplasty. 2014 Oct;29(10):1889-98. doi: 10.1016/j.arth.2014.05.019. Epub 2014 Jun 2.

Abstract

Influence of BMI upon patient outcomes and complications following THA was examined across a national cohort of patients. Outcomes were compared by BMI groups (19.0-29.9kg/m(2) [reference], 30.0-34.9kg/m(2) [obese class I], 35.0kg/m(2)+ [obese class II/III]), adjusted for case-mix differences. Obese class I patients had a significantly smaller improvement in OHS (18.9 versus 20.5, P<0.001) and a greater risk of wound complications (odds ratio [OR]=1.57, P=0.006). For obese class II/III patients, there were significantly smaller improvements in OHS and EQ-5D index (P<0.001), and greater risk of wound complications (P=0.006), readmission (P=0.001) and reoperation (P=0.003). Large improvements in patient outcomes were seen irrespective of BMI, although improvements were marginally smaller and complication rates higher in obese patients.

Keywords: body mass index; complications; national joint registry; patient reported outcomes; total hip replacement.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Arthroplasty, Replacement
  • Arthroplasty, Replacement, Hip / adverse effects*
  • Body Mass Index*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Obesity / complications*
  • Osteoarthritis, Hip / complications
  • Osteoarthritis, Hip / surgery*
  • Patient Outcome Assessment*
  • Reoperation
  • Retrospective Studies
  • Treatment Outcome