Temporal and spatial effect of air pollution on hospital admissions for myocardial infarction: a case-crossover study.

Temporal and spatial effect of air pollution on hospital admissions for myocardial infarction: a case-crossover study.
CMAJ Open. 2020 Oct-Dec;8(4):E619-E626
Authors: Liu X, Bertazzon S, Villeneuve PJ, Johnson M, Stieb D, Coward S, Tanyingoh D, Windsor JW, Underwood F, Hill MD, Rabi D, Ghali WA, Wilton SB, James MT, Graham M, McMurtry MS, Kaplan GG
Abstract
BACKGROUND: In studies showing associations between ambient air pollution and myocardial infarction (MI), data have been lacking on the inherent spatial variability of air pollution. The aim of this study was to determine whether the long-term spatial distribution of air pollution influences short-term temporal associations between air pollution and admission to hospital for MI.
METHODS: We identified adults living in Calgary who were admitted to hospital for an MI between 2004 and 2012. We evaluated associations between short-term exposure to air pollution (ozone [O3], nitrogen dioxide [NO2], sulfur dioxide [SO2], carbon monoxide [CO], particulate matter < 10 μm in diameter [PM10] and particulate matter < 2.5 μm in diameter [PM2.5]), and hospital admissions for MI using a time-stratified, case-crossover study design. Air Quality Health Index (AQHI) scores were calculated from a composition of O3, NO2 and PM2.5. Conditional logistic regression models were stratified by low, medium and high levels of neighbourhood NO2 concentrations derived from land use regression ...

Source: cmaj - October 1, 2020 Category: General Medicine Authors: Liu X, Bertazzon S, Villeneuve PJ, Johnson M, Stieb D, Coward S, Tanyingoh D, Windsor JW, Underwood F, Hill MD, Rabi D, Ghali WA, Wilton SB, James MT, Graham M, McMurtry MS, Kaplan GG Tags: CMAJ Open Source Type: research