“…The SLSR is a prospective, population-based study, running continuously since 1995, which aims to recruit all patients with a first stroke in a defined geographical area of south London, within Lambeth and North Southwark boroughs. 11 At the time of the 2011 UK census, the source population of the SLSR was 357 308 (50.4% men), comprising 56% White, 25% Black (14% Black African, 7% Black Caribbean, and 4% Other Black), and 18% Other ethnic groups. 12 Stroke was defined using the World Health Organization ICD-10 criteria, 13 with subtypes (ischemic and haemorrhagic stroke) defined by a study stroke physician, with reference to symptoms, neuroimaging and other test results.…”