Ischemic stroke on awakening: Patients' characteristics, outcomes and potential for reperfusion therapy

Silvia Koton, David Tanne, Natan M. Bornstein

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Reports on differences between patients with and without wake-up stroke are inconsistent. We studied the proportion, characteristics, and outcomes of wake-up ischemic stroke (IS) and estimated the number of potential candidates for reperfusion therapy in a national registry of hospitalized patients. Methods: IS patients in all three National Acute Stroke ISraeli (NASIS) registry periods (2004, 2007, and 2010; 2 months each) were included. In-hospital neurological complications, poor functional outcome (death, modified Rankin scale ≥2, or discharge to a nursing home), and in-hospital mortality were the study outcomes. Risks of poor outcomes were estimated with logistic regression analysis. Results: Wake-up IS was reported for 820/4,408 (18.6%) patients. Baseline characteristics were similar for patients with and without wake-up IS. ORs (95% CIs) for wake-up compared to non-wake-up IS were 1.2 (0.9-1.6) for neurological complications, 0.8 (0.7-0.98) for poor functional outcome, and 0.8 (0.5-1.2) for death. According to an estimated 20-40% prevalence of penumbra, wake-up stroke patients could add 3.7-7.4% to the number of patients potentially eligible for reperfusion therapy. Conclusions: Stroke on awakening is present in almost one fifth of IS patients. Characteristics and stroke outcomes are similar for patients with and without wake-up IS. Confirmation of a valid approach for the detection of wake-up stroke patients who can potentially benefit from reperfusion therapy is essential.

Original languageEnglish (US)
Pages (from-to)149-153
Number of pages5
JournalNeuroepidemiology
Volume39
Issue number3-4
DOIs
StatePublished - Oct 2012
Externally publishedYes

Keywords

  • Epidemiology
  • Ischemic stroke
  • Mortality
  • National registry
  • Outcome
  • Reperfusion therapy
  • Wake-up stroke

ASJC Scopus subject areas

  • Epidemiology
  • Clinical Neurology

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