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Domain-Specific Cognitive Recovery after First-Ever Stroke: A 2-Year Follow-Up.
OBJECTIVES: The aim of this work was to study the change in different cognitive domains after stroke during a 2-year follow-up.
METHOD: We evaluated both neuropsychologically and neurologically a consecutive cohort of working-age patients with a first-ever stroke at baseline (within the first weeks), 6 months, and 2 years after stroke-onset. A total of 153 patients participated in all examinations and were compared to 50 healthy controls.
RESULTS: Forty-nine percent of the patients were cognitively impaired at baseline, 41% at 6 months, and 39% at 2-year follow-up. We analyzed seven cognitive domains (impairment rates at baseline and 2-year follow-up): psychomotor speed (34%; 23%), executive functions (27%; 17%), visual memory (21%; 4%), visuospatial function (20%; 14%), verbal memory (18%; 12%), basic language processing (baseline 11%; 6 months 5%), and reasoning (2 years 14%). The patients who were cognitively impaired at baseline improved more within 6 months, than either the controls or cognitively intact patients in all cognitive domains (all p<.05). Later on, between 6 months and 2 years, the domain-specific change scores did not differ between patients who were cognitively intact and impaired at 6 months. Also, the cognitive status (intact or impaired) remained the same in 90% of patients between 6-month and 2-year follow-ups. At 2 years, half of the patients, who were categorized cognitively impaired, were rated as well-recovered according to neurological evaluation.
CONCLUSIONS: Most of the cognitive improvement took place within 6 months. Long-lasting cognitive impairment was common even after good neurological recovery. An early neuropsychological examination is essential in evaluating cognitive dysfunction and need for rehabilitation. (JINS, 2018, 24, 117-127).
METHOD: We evaluated both neuropsychologically and neurologically a consecutive cohort of working-age patients with a first-ever stroke at baseline (within the first weeks), 6 months, and 2 years after stroke-onset. A total of 153 patients participated in all examinations and were compared to 50 healthy controls.
RESULTS: Forty-nine percent of the patients were cognitively impaired at baseline, 41% at 6 months, and 39% at 2-year follow-up. We analyzed seven cognitive domains (impairment rates at baseline and 2-year follow-up): psychomotor speed (34%; 23%), executive functions (27%; 17%), visual memory (21%; 4%), visuospatial function (20%; 14%), verbal memory (18%; 12%), basic language processing (baseline 11%; 6 months 5%), and reasoning (2 years 14%). The patients who were cognitively impaired at baseline improved more within 6 months, than either the controls or cognitively intact patients in all cognitive domains (all p<.05). Later on, between 6 months and 2 years, the domain-specific change scores did not differ between patients who were cognitively intact and impaired at 6 months. Also, the cognitive status (intact or impaired) remained the same in 90% of patients between 6-month and 2-year follow-ups. At 2 years, half of the patients, who were categorized cognitively impaired, were rated as well-recovered according to neurological evaluation.
CONCLUSIONS: Most of the cognitive improvement took place within 6 months. Long-lasting cognitive impairment was common even after good neurological recovery. An early neuropsychological examination is essential in evaluating cognitive dysfunction and need for rehabilitation. (JINS, 2018, 24, 117-127).
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