Associations of heat and cold with hospitalizations and post-discharge deaths due to acute myocardial infarction: what is the role of pre-existing diabetes?
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Tong, Shilu
Ho, Hung Chak
Lin, Hualiang
Pan, Haifeng
Cheng, Jian
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Abstract
The existing evidence suggests that pre-existing diabetes may modify the association between heat and hospitalizations for acute myocardial infarction (AMI). Methods: This study included patients who were hospitalized for AMI from 1 January 2005 to 31 December 2013 in Brisbane, Australia, and also included those who died within 2 months after discharge. A time-stratified case-crossover design with conditional logistic regression was used to quantify the associations of heat and cold with hospitalizations and post-discharge deaths due to AMI in patients with and without pre-existing diabetes. Stratified analyses were conducted to explore whether age, sex and suburb-level green space and suburb-level socio-economic status modified the temperature-AMI relationship. Heat and cold were defined as the temperature above/below which the odds of hospitalizations/deaths due to AMI started to increase significantly. Results: There were 14 991 hospitalizations for AMI and 1811 died from AMI within 2 months after discharge during the study period. Significant association between heat and hospitalizations for AMI was observed only in those with pre-existing diabetes (odds ratio: 1.19, 95% confidence interval: 1.00-1.41) [heat (26.3°C) vs minimum morbidity temperature (22.2°C)]. Cold was associated with increased odds of hospitalizations for AMI in both diabetes and non-diabetes groups. Significant association between cold and post-discharge deaths from AMI was observed in both diabetes and non-diabetes groups. Conclusions: Individuals with diabetes are more susceptible to hospitalizations due to AMI caused by heat and cold.
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International Journal of Epidemiology
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51
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1
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Other environmental sciences
Epidemiology
Clinical sciences
Cardiovascular medicine and haematology
Science & Technology
Life Sciences & Biomedicine
Public, Environmental & Occupational Health
Heat
cold
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Xu, Z; Tong, S; Ho, HC; Lin, H; Pan, H; Cheng, J, Associations of heat and cold with hospitalizations and post-discharge deaths due to acute myocardial infarction: what is the role of pre-existing diabetes?, International Journal of Epidemiology, 2022, 51 (1), pp. 134-143