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
2015 Stroke  
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 %
more » ... 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.
doi:10.1161/strokeaha.115.010418 pmid:26585392 fatcat:d35us3mfkzelrf5ueoqve3zxri