Many houses in Tohoku region have a poor thermal environment during winter, and the incidence rate of cerebrovascular disease is the highest compared to the other areas in Japan. In order to clarify the association between the indoor environment of residential buildings and cerebrovascular disease, an epidemiological survey of approximately 200 elderly persons was conducted in three towns of Yamagata prefecture. This paper descnbes the results from a questionnaire survey conducted during the first phase of the study. Analyzed results indicate that exposure to poor indoor thermal environment is positively associated with an increased risk of cerebrovascular disease.
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