title: Is mortality after hip fracture associated with surgical delay or admission during weekends and public holidays? A retrospective study of 38,020 patients.
abstract: OBJECTIVE
  Hip fractures are associated with high mortality, but the cause of this is still not entirely clear. We investigated the effect of surgical delay, weekends, holidays, and time of day admission on mortality in hip fracture patients.
  
  
  METHODS
  Using data from the Danish National Indicator Project, we identified 38,020 patients admitted from 2003 to 2010. Logistic regression analysis was used to study the association between sex, age, weekend or holiday admission, night-time admission, time to surgery, and ASA score on the one hand and mortality on the other.
  
  
  RESULTS
  The risk of death in hospital increased with surgical delay (odds ratio (OR) = 1.3 per 24 h of delay), ASA score (OR (per point added) = 2.3), sex (OR for men 2.2), and age (OR (per 5 years) = 1.4). The mortality rate for patients admitted during weekends or public holidays, or at night, was similar to that found for those admitted during working days.
  
  
  CONCLUSIONS
  Minimizing surgical delay is the most important factor in reducing mortality in hip fracture patients.
authors.affiliation: Department of Orthopaedic Surgery, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark. ccilielaubjerg@hotmail.com
authors.forename: Cecilie Laubjerg
authors.initials: CL
authors.lastname: Daugaard
authors.forename: Henrik L
authors.initials: HL
authors.lastname: Jørgensen
authors.forename: Troels
authors.initials: T
authors.lastname: Riis
authors.forename: Jes B
authors.initials: JB
authors.lastname: Lauritzen
authors.forename: Benn R
authors.initials: BR
authors.lastname: Duus
authors.forename: Susanne
authors.initials: S
authors.lastname: van der Mark
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000379:methods / Q000401:mortality*; D002423:Cause of Death; D015331:Cohort Studies; D016001:Confidence Intervals; D003718:Denmark; D005260:Female; D005593:Fracture Fixation, Internal / Q000379:methods / Q000401:mortality*; D015577:Geriatric Assessment; D006620:Hip Fractures / Q000000981:diagnostic imaging / Q000401:mortality* / Q000601:surgery*; D006693:Holidays; D017052:Hospital Mortality / Q000639:trends*; D006760:Hospitalization / Q000639:trends; D006801:Humans; D015994:Incidence; D007902:Length of Stay; D016015:Logistic Models; D008297:Male; D016017:Odds Ratio; D010343:Patient Admission / Q000639:trends; D011859:Radiography; D012042:Registries; D012189:Retrospective Studies; D017751:Safety Management; D012737:Sex Factors; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D013997:Time Factors