| Summary: | 碩士 === 國立臺灣大學 === 環境衛生研究所 === 91 === Background and Purpose－The mortality from all strokes have been related to meteorologic factors in studies. Little is known about the meteorological influence in subtypes of stroke by age. This study examined the relationship between meteorologic factors and mortality from stroke by subtype for the elderly.
Methods－In the present study, we analyzed government assembled data by Poisson regression to examine the independent effects on mortality from stroke by age (65-74, 75-84, >85) in association with meteorologic factors, including temperature, air pressure, humidity, intradiurnal temperature variance and intradiurnal air pressure variance in Taiwan, from 1985 to 1999. Relationships between stroke mortality and weather for Taipei, Taichung, Kaohsiung and Hwalien areas were also compared.
Results－There was a seasonal variation in mortality from all types of stroke, with a peak in winter and spring and a trough in autumn and summer ,and a minor peak in July. The mortality from stroke had an inverse correlation with the ambient temperature, but positive associations with atmospheric pressure and intradiurnal atmospheric pressure variance. The correlations with relative humidity and intradiurnal ambient temperature variance were not statistically significant.
Conclusion－This study has revealed a strong relationship between temperature and stroke mortality among the elderly in Taiwan. The risk of deaths from SAH, ICH, and IS increases as the atmospheric temperature decreases.
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