title: Hip fracture risk and subsequent mortality among Alzheimer's disease patients in the United Kingdom, 1988-2007.
abstract: BACKGROUND
  hip fractures result in a significant burden to the patient, their caregivers and the health care system. Patients with Alzheimer's disease (AD) have a higher incidence of hip fracture compared with other older people without AD, although it is not clear if AD is an independent risk factor for hip fracture.
  
  
  METHODS
  a retrospective cohort study was conducted using anonymised electronic medical records from primary care practices in the United Kingdom. Proportional hazards regression modelling with adjustment for potential confounders was used to evaluate AD as an independent risk factor for predicting hip fractures.
  
  
  RESULTS
  the incidence of hip fracture among patients with and without AD was 17.4 (95% CI, 15.7-19.2) and 6.6 (95% CI, 5.8-7.6) per 1,000 person years, respectively. Patients with AD had a hazard that was 3.2 (95% CI, 2.4-4.2) times that of non-AD patients after controlling for potential confounders. AD patients who experienced a hip fracture also had an increased mortality rate compared with non-AD patients who experienced a hip fracture (hazard ratio = 1.5; 95% CI, 1.1-1.9).
  
  
  CONCLUSIONS
  patients with AD and their caregivers should be advised on how to prevent hip fractures and more attention should be given to AD patients who are undergoing rehabilitation following a hip fracture.
authors.affiliation: Wyeth, a Pfizer Company-Epidemiology, Collegeville, PA, USA. nicole.l.baker@pfizer.com
authors.forename: Nicole L
authors.initials: NL
authors.lastname: Baker
authors.forename: Michael N
authors.initials: MN
authors.lastname: Cook
authors.forename: H Michael
authors.initials: HM
authors.lastname: Arrighi
authors.forename: Roger
authors.initials: R
authors.lastname: Bullock
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000453:epidemiology / Q000401:mortality*; D015331:Cohort Studies; D005260:Female; D006620:Hip Fractures / Q000453:epidemiology* / Q000401:mortality* / Q000534:rehabilitation; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012307:Risk Factors; D015996:Survival Rate; D006113:United Kingdom / Q000453:epidemiology