title: Patient characteristics and risk of subsequent contralateral hip fracture after surgical management of first fracture.
abstract: BACKGROUND
  Sequential hip fractures are associated with increased morbidity and mortality. Understanding of risk factors is important for secondary prevention. Although hip fractures have a multifactorial aetiology related to falls, it is unknown whether fracture management approach influences the risk of sequential hip fractures.
  
  
  OBJECTIVE
  Our objective is to explore whether subsequent contralateral hip fractures are more common following femoral head replacement or salvage procedures for the treatment of hip fractures.
  
  
  METHODS
  Patients older than 50, admitted to a single regional trauma unit in Worcestershire between 2010 and 2012 were identified from the national database. 700 patients matched our inclusion criteria and case notes were reviewed. The male to female ratio was 1:3.3 and the mean age was 82.8 years (standard deviation: 8.9 years). Contralateral fractures were identified from admission X-rays. Risk factors were analysed based on patient demographics and data related to first hip fracture management.
  
  
  RESULTS
  Seventy-one patients presented with contralateral fractures, of which 19 had their first fracture during the data collection period, estimating a period prevalence of 10.1%, and incidence of 2.9%. Contralateral fracture rates were not significantly different between femoral head salvage and replacement procedures (P-value 0.683). Older institutionalised females with poorer mobility status were at greatest risk of contralateral hip fractures. Half (50.7%) of these occurred within 2 years of their first fracture.
  
  
  CONCLUSIONS
  No additional risk was seen in either fixation approaches. Risk factors identified were in keeping with existing literature, which can help to identify high-risk groups for targeted prevention strategies.
authors.affiliation: University Hospital of North Staffordshire, Stoke-on-Trent, UK. Electronic address: jlau87@doctors.org.uk.
authors.forename: Jeffrey Chirk Fan
authors.initials: JC
authors.lastname: Lau
authors.affiliation: Chinese University of Hong Kong, China.
authors.forename: Ki Wai
authors.initials: KW
authors.lastname: Ho
authors.affiliation: Worcestershire Royal Hospital, Worcester, UK.
authors.forename: Shahzad
authors.initials: S
authors.lastname: Sadiq
mesh_terms: D000058:Accidental Falls / Q000517:prevention & control / Q000706:statistics & numerical data; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D016330:Frail Elderly / Q000706:statistics & numerical data*; D006620:Hip Fractures / Q000453:epidemiology / Q000503:physiopathology / Q000601:surgery*; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D008297:Male; D010024:Osteoporosis / Q000150:complications* / Q000453:epidemiology; D011183:Postoperative Complications / Q000453:epidemiology / Q000503:physiopathology / Q000601:surgery*; D012307:Risk Factors; D014193:Trauma Centers / Q000706:statistics & numerical data; D006113:United Kingdom
keywords: Contralateral; Femoral replacement; Femoral salvage; Hip fracture; Patient characteristics; Risk factors; Subsequent; Surgical fixation