title: The prevalence of osteoporosis in patients with severe hip and knee osteoarthritis awaiting joint arthroplasty.
abstract: BACKGROUND
  the presence of osteoporosis in patients with hip and knee osteoarthritis (OA) has important implications for understanding disease progression and providing optimal surgical and medical management.
  
  
  OBJECTIVE
  to determine the prevalence of osteoporosis among patients with osteoarthritis awaiting total knee arthroplasty or total hip arthroplasty aged between 65 and 80 years.
  
  
  METHODS
  cross-sectional observational study.
  
  
  METHODS
  tertiary referral centre in Newcastle upon Tyne, UK.
  
  
  METHODS
  patients with osteoarthritis awaiting total knee hip arthroplasty aged between 65 and 80 years.
  
  
  METHODS
  lumbar spine, bilateral femoral and forearm bone mineral density (BMD) measurements were obtained using dual-energy X-ray absorptiometry.
  
  
  RESULTS
  the cohort consisted of 199 patients with a mean age of 72 years (SD 4), and 113 (57%) were women. The overall rate of osteoporosis at any site was 23% (46/199) and a further 43% (85/199) of patients would have been classified as osteopaenic according to World Health Organization criteria. Osteoporosis was more commonly detected in the forearm (14%) than the lumbar spine (8.5%) and proximal femur of the index side (8.2%).
  
  
  CONCLUSIONS
  in summary, a significant proportion of patients with end-stage OA have osteoporosis but this diagnosis may be missed unless BMD measurements are performed at sites distant from joints affected by OA.
authors.affiliation: Department of Orthopaedic Surgery, Freeman Hospital, Newcastle upon Tyne, NE7 7DN, UK.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Lingard
authors.forename: Sheryl Y
authors.initials: SY
authors.lastname: Mitchell
authors.forename: Roger M
authors.initials: RM
authors.lastname: Francis
authors.forename: David
authors.initials: D
authors.lastname: Rawlings
authors.forename: Robert
authors.initials: R
authors.lastname: Peaston
authors.forename: Fraser N
authors.initials: FN
authors.lastname: Birrell
authors.forename: Andrew W
authors.initials: AW
authors.lastname: McCaskie
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density / Q000502:physiology*; D003430:Cross-Sectional Studies; D005260:Female; D005269:Femur / Q000502:physiology; D005542:Forearm / Q000502:physiology; D006801:Humans; D016015:Logistic Models; D008297:Male; D015207:Osteoarthritis, Hip / Q000150:complications* / Q000000981:diagnostic imaging; D020370:Osteoarthritis, Knee / Q000150:complications* / Q000000981:diagnostic imaging; D010024:Osteoporosis / Q000150:complications / Q000453:epidemiology*; D015995:Prevalence; D012737:Sex Factors; D013131:Spine / Q000502:physiology; D011795:Surveys and Questionnaires; D006113:United Kingdom / Q000453:epidemiology