Association of air pollution and use of glyceryl trinitrate against angina pectoris: a population-based case-crossover study

Springer Science and Business Media LLC - 2013
Ragnhildur Gudrun Finnbjornsdottir1, Helga Zoëga1, Ö Ólafsson1, Þorsteinn Þorsteinsson2, Vilhjálmur Rafnsson3
1Center of Public Health Sciences, Faculty of Medicine, University of Iceland, Reykjavík, Iceland
2Environment and Natural resources, University of Iceland, Reykjavík, Iceland
3Department of Preventive Medicine, University of Iceland, Reykjavík, Iceland

Tóm tắt

Abstract Background

Ambient air pollution has been associated with increased cardiovascular morbidity and mortality. In Reykjavik, Iceland, air pollutant concentrations exceed official health limits several times every year. The aim was to study the association of concentrations of NO2, O3, PM10, and H2S in the Reykjavik capital area with the dispensing of anti-angina pectoris medication, glyceryl trinitrate to the inhabitants.

 Methods

Data on daily dispensing of glyceryl trinitrate, were retrieved from the Icelandic Medicines Registry. Data on hourly concentrations of NO2, O3, PM10, and H2S were obtained from the Environment Agency of Iceland. A case-crossover design was used, based on the dispensing of glyceryl trinitrate to 5,246 individuals (≥18 years) between 2005 and 2009.

 Results

For every 10 μg/m3 increase of NO2 and O3 3-day mean concentrations, the odds ratio (OR) for daily dispensing of glyceryl trinitrates was 1.136 (95% confidence intervals (CI) 1.069-1.207) and 1.094 (95% CI 1.029-1.163) at lag 0, and OR was 1.096 (95% CI 1.029-1.168) and 1.094 (95% CI 1.028-1.166) at lag 1, respectively.

 Conclusions

These findings suggest that NO2 and O3 ambient air concentrations may adversely affect cardiovascular health, as measured by the dispensing of glyceryl trinitrates for angina pectoris. Further, the findings suggest that data on the dispensing of medication may be a valuable health indicator when studying the effect of air pollution on cardiovascular morbidity.

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