title: The impact of body mass index on patient reported outcome measures (PROMs) and complications following primary hip arthroplasty.
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.
authors.affiliation: School of Medicine and Health, Durham University, Queen's Campus, Stockton-on-Tees, UK; The National Joint Registry for England and Wales; School of Medicine, Pharmacy and Health, Durham University, Queen's Campus, Stockton-on-Tees, UK.
authors.forename: Simon S
authors.initials: SS
authors.lastname: Jameson
authors.affiliation: School of Medicine and Health, Durham University, Queen's Campus, Stockton-on-Tees, UK; School of Medicine, Pharmacy and Health, Durham University, Queen's Campus, Stockton-on-Tees, UK.
authors.forename: James M
authors.initials: JM
authors.lastname: Mason
authors.affiliation: The National Joint Registry for England and Wales.
authors.forename: Paul N
authors.initials: PN
authors.lastname: Baker
authors.affiliation: Newcastle Hospitals NHS Foundation Trust, Newcastle, upon Tyne, UK.
authors.forename: David W
authors.initials: DW
authors.lastname: Elson
authors.affiliation: Newcastle Hospitals NHS Foundation Trust, Newcastle, upon Tyne, UK.
authors.forename: David J
authors.initials: DJ
authors.lastname: Deehan
authors.affiliation: Northumbria Healthcare NHS Foundation Trust, Ashington, Northumberland, UK.
authors.forename: Mike R
authors.initials: MR
authors.lastname: Reed
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019643:Arthroplasty, Replacement; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects*; D015992:Body Mass Index; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications*; D015207:Osteoarthritis, Hip / Q000150:complications / Q000601:surgery*; D063868:Patient Outcome Assessment; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome
keywords: body mass index; complications; national joint registry; patient reported outcomes; total hip replacement