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Time series analysis of the association between ambient temperature and cerebrovascular morbidity in the elderly in Shanghai, China.


ABSTRACT: Research on the association between ambient temperature and cerebrovascular morbidity is scarce in China. In this study, we applied mixed generalized additive model (MGAM) to daily counts of cerebrovascular disease of Shanghai residents aged 65 years or older from 2007-2011, stratified by gender. Weighted daily mean temperature up to lags of one week was smoothed by natural cubic spline, and was added into the model to assess both linear and nonlinear effects of temperature. We found that when the mean temperature increased by 1?°C, the male cases of cerebrovascular disease reduced by 0.95% (95% Confidence Interval (CI): 0.80%, 1.10%) or reduced by 0.34% (95% CI: -0.68, 1.36%) in conditions of temperature was below or above 27?°C. However, for every 1?°C increase in temperature, the female cases of cerebrovascular disease increased by 0.34% (95% CI: -0.26%, 0.94%) or decreased by 0.92% (95% CI: 0.72, 1.11%) in conditions of temperature was below or above 8?°C, respectively. Temperature and cerebrovascular morbidity is negatively associated in Shanghai. MGAM is recommended in assessing the association between environmental hazards and health outcomes in time series studies.

SUBMITTER: Zhang XJ 

PROVIDER: S-EPMC4707484 | biostudies-literature | 2016 Jan

REPOSITORIES: biostudies-literature

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Time series analysis of the association between ambient temperature and cerebrovascular morbidity in the elderly in Shanghai, China.

Zhang Xian-Jing XJ   Ma Wei-Ping WP   Zhao Nai-Qing NQ   Wang Xi-Ling XL  

Scientific reports 20160111


Research on the association between ambient temperature and cerebrovascular morbidity is scarce in China. In this study, we applied mixed generalized additive model (MGAM) to daily counts of cerebrovascular disease of Shanghai residents aged 65 years or older from 2007-2011, stratified by gender. Weighted daily mean temperature up to lags of one week was smoothed by natural cubic spline, and was added into the model to assess both linear and nonlinear effects of temperature. We found that when t  ...[more]

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