Impact of bilingualism on cognitive outcome after stroke

Suvarna Alladi, Thomas H. Bak, Shailaja Mekala, Amulya Rajan, Jaydip Ray Chaudhuri, Eneida Mioshi, Rajesh Krovvidi, Bapiraju Surampudi, Vasanta Duggirala, Subhash Kaul

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Background and Purpose:  Bilingualism has been associated with slower cognitive aging and a later onset of dementia. In this study, we aimed to determine whether bilingualism also influences cognitive outcome after stroke.  Methods:  We examined 608 patients with ischemic stroke from a large stroke registry and studied the role of bilingualism in predicting poststroke cognitive impairment in the absence of dementia.  Results: A larger proportion of bilinguals had normal cognition compared with monolinguals (40.5% versus 19.6%; P<0.0001), whereas the reverse was noted in patients with cognitive impairment, including vascular dementia and vascular mild cognitive impairment (monolinguals 77.7% versus bilinguals 49.0%; P<0.0009). There were no differences in the frequency of aphasia (monolinguals 11.8% versus bilinguals 10.5%; P=0.354). Bilingualism was found to be an independent predictor of poststroke cognitive impairment.  Conclusions  Our results suggest that bilingualism leads to a better cognitive outcome after stroke, possibly by enhancing cognitive reserve.
Original languageEnglish
Pages (from-to)258-261
Number of pages4
JournalStroke
Volume47
Issue number1
Early online date19 Nov 2015
DOIs
Publication statusPublished - Jan 2016

Keywords

  • aphasia
  • stroke
  • risk factors
  • language
  • vascular
  • dementia

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