The impact of bilingualism on cognitive outcome after stroke

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

doi:10.1161/STROKEAHA.115.010418

The impact of bilingualism on cognitive outcome after stroke

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

Research output: Contribution to journal › Article › peer-review

Abstract

Background and purpose: Bilingualism has been associated with slower cognitive ageing 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 ischemic stroke patients from a large stroke registry and studied the role of bilingualism in predicting post-stroke cognitive impairment in the absence of dementia.

Results: A larger proportion of bilinguals had normal cognition compared to monolinguals (40.5 % vs19.6 %, P<0.0001) while the reverse was noted in patients with cognitive impairment, including vascular dementia and vascular mild cognitive impairment (monolinguals 77.7% vs bilinguals 49.0%, P<0.0009). There were no differences in the frequency of aphasia (monolinguals 11.8% vs bilinguals 10.5%, P =0.354). Bilingualism was found to be an independent predictor of post-stroke cognitive impairment.

Conclusions: Our results suggest that bilingualism leads to a better cognitive outcome following stroke, possibly by enhancing cognitive reserve.

Original language	English
Journal	Stroke
DOIs	https://doi.org/10.1161/STROKEAHA.115.010418
Publication status	Published - 19 Nov 2015

Keywords / Materials (for Non-textual outputs)

aphasia
stroke
risk factors
Language
VASCULAR DEMENTIA

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Alladi-S-2015-The-impact-of-bilingualism-on-cognitive-outcome-after-strokeAccepted author manuscript, 574 KB

Thomas Bak
- thomas.baked.acuk
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@article{adc015744b594d8ab331ac93fe9a543f,

title = "The impact of bilingualism on cognitive outcome after stroke",

abstract = "Background and purpose: Bilingualism has been associated with slower cognitive ageing 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 ischemic stroke patients from a large stroke registry and studied the role of bilingualism in predicting post-stroke cognitive impairment in the absence of dementia. Results: A larger proportion of bilinguals had normal cognition compared to monolinguals (40.5 % vs19.6 %, P<0.0001) while the reverse was noted in patients with cognitive impairment, including vascular dementia and vascular mild cognitive impairment (monolinguals 77.7% vs bilinguals 49.0%, P<0.0009). There were no differences in the frequency of aphasia (monolinguals 11.8% vs bilinguals 10.5%, P =0.354). Bilingualism was found to be an independent predictor of post-stroke cognitive impairment. Conclusions: Our results suggest that bilingualism leads to a better cognitive outcome following stroke, possibly by enhancing cognitive reserve. ",

keywords = "aphasia, stroke, risk factors, Language, VASCULAR DEMENTIA",

author = "Suvarna Alladi and Thomas Bak and Mekala Shailaja and Amulya Rajan and {Jaydip Ray}, Chaudhuri and Eneida Mioshi and Rajesh Krovvidi and Bapiraju Surampudi and Vasanta Duggirala and Subhash Kaul",

year = "2015",

month = nov,

day = "19",

doi = "10.1161/STROKEAHA.115.010418",

language = "English",

journal = "Stroke",

issn = "0039-2499",

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T1 - The impact of bilingualism on cognitive outcome after stroke

AU - Alladi, Suvarna

AU - Bak, Thomas

AU - Shailaja, Mekala

AU - Rajan , Amulya

AU - Jaydip Ray, Chaudhuri

AU - Mioshi, Eneida

AU - Krovvidi, Rajesh

AU - Surampudi, Bapiraju

AU - Duggirala, Vasanta

AU - Kaul, Subhash

PY - 2015/11/19

Y1 - 2015/11/19

N2 - Background and purpose: Bilingualism has been associated with slower cognitive ageing 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 ischemic stroke patients from a large stroke registry and studied the role of bilingualism in predicting post-stroke cognitive impairment in the absence of dementia. Results: A larger proportion of bilinguals had normal cognition compared to monolinguals (40.5 % vs19.6 %, P<0.0001) while the reverse was noted in patients with cognitive impairment, including vascular dementia and vascular mild cognitive impairment (monolinguals 77.7% vs bilinguals 49.0%, P<0.0009). There were no differences in the frequency of aphasia (monolinguals 11.8% vs bilinguals 10.5%, P =0.354). Bilingualism was found to be an independent predictor of post-stroke cognitive impairment. Conclusions: Our results suggest that bilingualism leads to a better cognitive outcome following stroke, possibly by enhancing cognitive reserve.

AB - Background and purpose: Bilingualism has been associated with slower cognitive ageing 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 ischemic stroke patients from a large stroke registry and studied the role of bilingualism in predicting post-stroke cognitive impairment in the absence of dementia. Results: A larger proportion of bilinguals had normal cognition compared to monolinguals (40.5 % vs19.6 %, P<0.0001) while the reverse was noted in patients with cognitive impairment, including vascular dementia and vascular mild cognitive impairment (monolinguals 77.7% vs bilinguals 49.0%, P<0.0009). There were no differences in the frequency of aphasia (monolinguals 11.8% vs bilinguals 10.5%, P =0.354). Bilingualism was found to be an independent predictor of post-stroke cognitive impairment. Conclusions: Our results suggest that bilingualism leads to a better cognitive outcome following stroke, possibly by enhancing cognitive reserve.

KW - aphasia

KW - stroke

KW - risk factors

KW - Language

KW - VASCULAR DEMENTIA

U2 - 10.1161/STROKEAHA.115.010418

DO - 10.1161/STROKEAHA.115.010418

M3 - Article

SN - 0039-2499

JO - Stroke

JF - Stroke

ER -

The impact of bilingualism on cognitive outcome after stroke

Abstract

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Thomas Bak

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