Epidemiological data of stroke in Thailand can be gathered from 2 main sources. First, general data collected from hospitals and the national health security service are reported in the official Country Report from the Ministry of Public Health. A Second more accurate data source comes from national surveys, registries, and cohort studies. A large cohort study among more than 20,000 Thais in various parts of Thailand or the Thai Epidemiological Stroke (TES) Study has provided salient data related to stroke prevalence and it is also the first study offering data on the incidence of stroke in Thailand.5 Another study worth mentioning is the Thai Stroke Registry which has collected data from more than 1,000 stroke patients who were admitted to 76 hospitals around Thailand.6 Information regarding risk factors and treatment are derived from other smaller studies.