This study looks at the prevalence of multimorbidity (the presence of two or more long-term conditions) internationally. Multimorbidity affects patients by increasing their burden of symptoms, but is also likely to increase the self-care demands, or treatment burden, that they experience. 

Treatment burden refers to the effort expended in operationalising treatments, navigating healthcare systems and managing relations with healthcare providers. These risks rise sharply in people diagnosed with chronic illness such as stroke. 

Katie I. Gallacher, of the University of Glasgow in Scotland, and colleagues, examined the prevalence of multimorbidity and polypharmacy in a large, nationally representative population of primary care patients with and without stroke, adjusting for age, sex and deprivation.

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