In this meta-analysis, which took data from 21 studies, the prevalence of cognitive impairment but not dementia in the year after stroke ranged from 17.5–54.9%.1 The pooled prevalence in this study was 38%; in other words, approximately four patients out of every ten will experience some degree of cognitive impairment in the year after stroke.1
References:
1. Sexton E, McLoughlin A, Williams DJ, et al. Systematic review and meta-analysis of the prevalence of cognitive impairment no dementia in the first year post-stroke. Eur Stroke J 2019; 4 (2): 160–171.
2. Pendlebury ST, Rothwell PM. Prevalence, incidence, and factors associated with pre-stroke and post-stroke dementia: a systematic review and meta-analysis. Lancet Neurol 2009; 8 (11): 1006–1018.