title: The epidemiology and surgical outcomes of patients undergoing primary total hip replacement: an Asian perspective.
abstract: BACKGROUND
  The number of total knee replacements far exceeds the number of primary total hip replacements (THR) in Singapore. There is a paucity of data regarding patients who undergo THR in Singapore. This paper aimed to study the epidemiology and early postoperative outcomes of patients receiving primary THR in a single tertiary institution.
  
  
  METHODS
  This is a retrospective study of all patients undergoing primary THR between January 2003 and December 2005. The following variables were analysed: patient demographics, surgical approach, mode of implant fixation, postoperative complications and functional outcomes using D'Aubigne and Postel scoring.
  
  
  RESULTS
  There were a total of 115 patients who underwent primary THR over a 36-month period. The mean age of patients was 55 (range 23-80) years. The male-to-female ratio was 1:2. The most common diagnoses in descending order were as follows: inflammatory arthritis, osteoarthritis, avascular necrosis, hip dysplasia and post-traumatic osteoarthritis. Patients were evaluated at a mean follow-up of 41 months, with 90.8 percent having excellent and good outcomes. There were no statistical differences between the surgical approach and implant fixation with regard to postoperative outcome.
  
  
  CONCLUSIONS
  In Asian patients, the three commonest aetiologies for degenerative hip arthritis were inflammatory arthropathies, primary osteoarthritis and avascular necrosis. Regardless of diagnosis, the patient groups had comparable functional outcomes following THR.
authors.affiliation: Adult Reconstructive Surgery & Complex Trauma, Department of Orthopaedic Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore.
authors.forename: Y E B
authors.initials: YE
authors.lastname: Liu
authors.forename: S
authors.initials: S
authors.lastname: Hu
authors.forename: S P
authors.initials: SP
authors.lastname: Chan
authors.forename: S S
authors.initials: SS
authors.lastname: Sathappan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods* / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000453:epidemiology / Q000209:etiology / Q000601:surgery*; D011183:Postoperative Complications; D020127:Recovery of Function; D012189:Retrospective Studies; D012846:Singapore / Q000453:epidemiology; D016896:Treatment Outcome