title: Comorbidity as a predictor of mortality and mobility after hip fracture.
abstract: OBJECTIVE
  To determine mortality and mobility rates after hip fracture.
  
  
  METHODS
  A prospective study (n = 199 patients) was carried out in the Health Care Center of A Coruña (Spain) during the period between January 2009 and December 2011. A descriptive study, and Cox and logistic regression analysis were carried out. Informed consent and ethical review board approval were obtained (code 2010/120 CEIC Galicia).
  
  
  RESULTS
  The patients' mean age was 82.5 ± 8.4 years and 76% were female. The average Charlson Comorbidity Index score was 6.1 ± 2.1. Creatinine clearance <60 mL/min/1.73 m(2) was 44%. The probability of survival 6 months after hip fracture was 89.2% and the survival rate at 12 months was 81.4%. Cox regression analysis showed that the indicator that most influenced mortality rate was comorbidity (HR = 1.133; P = 0.020) and age approaching borderline statistical significance (HR = 1.034; P = 0.064). The Parker Mobility Score decreased significantly (P < 0.001) after hip fracture. Before fracture, 19% of the patients were able to get about the house, 26% were able to get out of the house and 55% were able to go shopping. After hip fracture (90 days), the percentages changed to 56.2%, 19.1% and 24.7%, respectively (P < 0.001). After taking into account age, sex, type of fracture, surgical delay, previous fracture and comorbidity, the only indicator capable of predicting incapacity to walk was comorbidity.
  
  
  CONCLUSIONS
  Comorbidity is the best predictor of mortality and mobility after hip fracture. Geriatr Gerontol Int 2016; 16: 561-569.
authors.affiliation: Modelo Hospital, HM Hospitals, Surbone Clinic, A Coruña, Spain.
authors.forename: Jorge
authors.initials: J
authors.lastname: González-Zabaleta
authors.affiliation: Clinical Epidemiology and Biostatistics Research Group, Biomedical Research Institute of A Coruña (INIBIC), A Coruña Hospital (CHUAC), SERGAS, University of A Coruña, A Coruña, Spain.
authors.forename: Salvador
authors.initials: S
authors.lastname: Pita-Fernandez
authors.affiliation: Clinical Epidemiology and Biostatistics Research Group, Biomedical Research Institute of A Coruña (INIBIC), A Coruña Hospital (CHUAC), SERGAS, University of A Coruña, A Coruña, Spain.
authors.forename: Teresa
authors.initials: T
authors.lastname: Seoane-Pillado
authors.affiliation: Clinical Epidemiology and Biostatistics Research Group, Biomedical Research Institute of A Coruña (INIBIC), A Coruña Hospital (CHUAC), SERGAS, University of A Coruña, A Coruña, Spain.
authors.forename: Beatriz
authors.initials: B
authors.lastname: López-Calviño
authors.affiliation: Modelo Hospital, HM Hospitals, Surbone Clinic, A Coruña, Spain.
authors.forename: Jose Luis
authors.identifier: http://orcid.org/0000-0002-6026-8389
authors.initials: JL
authors.lastname: Gonzalez-Zabaleta
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005500:Follow-Up Studies; D005592:Fracture Fixation; D006620:Hip Fractures / Q000150:complications* / Q000401:mortality* / Q000601:surgery; D006801:Humans; D008297:Male; D011446:Prospective Studies; D020127:Recovery of Function; D012044:Regression Analysis; D013030:Spain; D015996:Survival Rate; D016138:Walking / Q000502:physiology*
keywords: hip fractures; hip replacement; mobility; mortality; recovery of function