title: Renal function predicts survival in patients with acute ischemic stroke.
abstract: BACKGROUND
  Among patients with acute ischemic stroke, impaired kidney function has been shown to increase the mortality risk, but the shape of this relationship has not been evaluated in detail.
  
  
  METHODS
  We estimated the glomerular filtration rate (eGFR) at the time of hospitalization in 1,175 consecutive patients hospitalized with acute ischemic stroke at the Beth Israel Deaconess Medical Center and examined the shape of the association between eGFR and all-cause mortality.
  
  
  RESULTS
  There were 508 deaths during a median follow-up of 40.3 months, resulting in a 'U'-shaped relationship between eGFR and all-cause mortality. The curve was relatively flat between 75 and 110 ml/min/1.73 m(2) but increased sharply at lower and higher levels of eGFR (test for nonlinearity: p < 0.0001).
  
  
  CONCLUSIONS
  Among patients with acute ischemic stroke, a reduced or highly elevated eGFR at hospital admission is associated with a higher mortality rate compared to patients with moderate levels of eGFR.
authors.affiliation: Cardiovascular Epidemiology Research Unit, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Mostofsky
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Wellenius
authors.forename: Amit
authors.initials: A
authors.lastname: Noheria
authors.forename: Emily B
authors.initials: EB
authors.lastname: Levitan
authors.forename: Mary R
authors.initials: MR
authors.lastname: Burger
authors.forename: Gottfried
authors.initials: G
authors.lastname: Schlaug
authors.forename: Murray A
authors.initials: MA
authors.lastname: Mittleman
mesh_terms: D000328:Adult; D001741:Black or African American / Q000208:ethnology; D000368:Aged; D000369:Aged, 80 and over; D003404:Creatinine / Q000097:blood; D005260:Female; D005500:Follow-Up Studies; D005919:Glomerular Filtration Rate / Q000502:physiology*; D006801:Humans; D007668:Kidney / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D016016:Proportional Hazards Models; D020521:Stroke / Q000175:diagnosis* / Q000208:ethnology / Q000401:mortality* / Q000503:physiopathology; D015996:Survival Rate; D044465:White People / Q000208:ethnology
chemical_list: D003404:Creatinine