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-  2019 

Systematic review and meta

DOI: 10.1177/2396987318825484

Keywords: Stroke,cognition,dementia,systematic reviews

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Abstract:

Increasing attention is being paid to interventions for cognitive impairment (CI) post-stroke, including for CI that does not meet dementia criteria. The aim of this paper was to conduct a systematic review and meta-analysis of the prevalence of cognitive impairment no dementia (CIND) within one year post-stroke. Pubmed, EMBASE and PsychInfo were searched for papers published in English in 1995–2017. Included studies were population or hospital-based cohort studies for first-ever/recurrent stroke, assessing CIND using standardised criteria at 1–12 months post-stroke. Abstracts were screened, followed by full text review of potentially relevant articles. Data were extracted using a standard form, and study quality was appraised using the Crowe Critical Appraisal Tool. A pooled prevalence of CIND with 95% confidence intervals (CI) was estimated using random-effects meta-analysis. Heterogeneity was measured using the I2 statistic. A total of 7000 abstracts were screened, followed by 1028 full text articles. Twenty-three articles were included in the systematic review, and 21 in the meta-analysis. The pooled CIND prevalence was 38% [95% CI?=?32–43%] (I2=92.5%, p?<?0.01). Study quality emerged as one source of heterogeneity. The five studies with the highest quality scores had no heterogeneity (I2=0%, p?=?0.99), with a similar pooled prevalence (39%, 95%CI?=?35–42%). Other sources of heterogeneity were stroke type, inclusion of pre-stroke CI, and age at assessment time. Discussion and conclusion: Meta-analysis of available studies indicates that in the first year post-stroke, 4 in 10 patients display a level of cognitive impairment that does not meet the criteria for dementia

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