title: Projecting the need for hip replacement over the next three decades: influence of changing demography and threshold for surgery.
abstract: OBJECTIVE
  To estimate the requirement for total hip replacement in the United Kingdom over the next three decades
  
  
  METHODS
  Projection of age and sex specific hip replacements in the UK over 10 year intervals taking account of demographic change and the extrapolation of arthroplasty rates from Sweden; a country with recently introduced guidelines.
  
  
  RESULTS
  Assuming no change in the age and sex specific arthroplasty rates, the estimated number of hip replacements will increase by 40% over the next 30 year period because of demographic change alone. The proportionate change will be substantially higher in men (51%) than women (33%), with a doubling of the number of male hip replacements in those aged over 85. Changes in the threshold for surgery may increase this further-up to double the current number.
  
  
  CONCLUSIONS
  A sharp rise in hip replacements will be needed to satisfy needs in the UK population over the next 30 years.
authors.affiliation: ARC Epidemiology Unit, University of Manchester, M13 9PT.
authors.forename: F
authors.initials: F
authors.lastname: Birrell
authors.forename: O
authors.initials: O
authors.lastname: Johnell
authors.forename: A
authors.initials: A
authors.lastname: Silman
mesh_terms: D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000706:statistics & numerical data*; D003710:Demography; D005260:Female; D005544:Forecasting; D006301:Health Services Needs and Demand / Q000639:trends*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020380:Needs Assessment; D017678:Sex Distribution; D006113:United Kingdom / Q000453:epidemiology