title: Acute kidney injury in the elderly hospitalized patients.
abstract: OBJECTIVE
  We aimed to evaluate acute kidney injury (AKI), occurrence of recovery and risk factors associated with permanent kidney injury and mortality in the elderly individuals.
  
  
  METHODS
  Evidence for this study was obtained from retrospective cohort study from our center.
  
  
  METHODS
  A total of 193 patients (>65 years, mean age: 79.99 ± 6.93) with acute kidney injury were enrolled in this study between 2011 and 2012. PATIENTS with kidney failure or renal replacement therapy (RRT) history at admission were excluded.
  
  
  METHODS
  Main outcome measurements: serum creatinine (SCr), estimated GFR (with CKD-Epi) and complete blood counts were evaluated at baseline and daily basis thereafter. The AKI was defined based on Kidney Disease Improving Global Outcomes (KDIGO) classification.
  
  
  RESULTS
  Among 193 patients, 43 (22%) patients required RRT. Mortality rate was 18% (n = 36) SCr levels were restored within 9.9 ± 6.7days on average (8-39 days). Sixteen patients (12.7%) required RRT after discharge. The mean hospital stay was 10.1 ± 8.6 days (7-41 days). Mortality rate of patients who have no renal recovery was higher (44.8% vs. 4.8%) than renal recovery group (p < 0.01).
  
  
  CONCLUSIONS
  The AKI represents a frequent complication in the elderly patients with longer hospital stay and increased mortality and morbidity. Our results show that dialytic support requirement is an independent predictor of permeant kidney injury in the elderly AKI patients. Older age, low diastolic blood pressure, high CRP and low hemoglobin levels were independent risk factors for mortality.
authors.affiliation: Department of Nephrology and Internal Medicine, Haydarpasa Numune Research and Teaching Hospital , Istanbul , Turkey.
authors.forename: Kadir
authors.initials: K
authors.lastname: Kayatas
authors.forename: Gulizar
authors.initials: G
authors.lastname: Sahin
authors.forename: Mehmet
authors.initials: M
authors.lastname: Tepe
authors.forename: Zeynep Ece
authors.initials: ZE
authors.lastname: Kaya
authors.forename: Suheyla
authors.initials: S
authors.lastname: Apaydin
authors.forename: Refik
authors.initials: R
authors.lastname: Demirtunç
mesh_terms: D058186:Acute Kidney Injury / Q000628:therapy*; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D020127:Recovery of Function; D017582:Renal Replacement Therapy; D012189:Retrospective Studies; D012307:Risk Factors
keywords: Acute kidney injury; dialysis; elderly; mortality; outcome