Anxiety is a common and distressing problem after stroke. A previous systematic review of observational studies  included 44 studies published to March 2011. The review needed updating: there were known to be more recent primary studies of anxiety after stroke and some sub-group analyses had previously been based on small samples, with resultant imprecision.
Knapp, P., Dunn-Roberts, A., Sahib, N., Cook, L., Astin, F., Kontou, E., & Thomas, S. (2020). Frequency of anxiety after stroke: An updated systematic review and meta-analysis of observational studies. International Journal of Stroke, 15(3), 244-255. https://doi.org/10.1177/1747493019896958