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Table 5 Odds ratios (95% CI) for the association between ICD discharge and an interquartile range increase in 24 h mean air pollutant concentrations stratified by the five regions of Ontario (n = 1919). Results were adjusted for 24 h mean temperature, relative humidity and barometric pressure

From: Do acute changes in ambient air pollution increase the risk of potentially fatal cardiac arrhythmias in patients with implantable cardioverter defibrillators?

Air PollutantRegion of Ontario
Eastern (n = 426)Central (n = 738)Metropolitan Toronto (n = 349)Southwestern (n = 298)Northern (n = 108)
SO2, ppb1.95 (0.89–4.28)0.94 (0.83–1.07)0.91 (0.70–1.20)0.94 (0.80–1.12)0.90 (0.45–1.77)
NO2, ppb0.82 (0.46–1.45)0.80 (0.62–1.02)0.96 (0.70–1.30)1.20 (0.75–1.93)0.7 2 (0.14–3.74)
Ozone, ppb0.85 (0.61–1.19)1.10 (0.87–1.39)1.10 (0.77–1.56)0.98 (0.66–1.45)1.04 (0.46–2.34)
PM2.5, μg/m3 (adj)0.97 (0.75–1.26)0.94 (0.81–1.10)1.12 (0.92–1.36)0.84 (0.65–1.10)0.80 (0.40–1.62)
AQHI0.87 (0.63–1.20)0.88 (0.74–1.04)0.93 (0.75–1.16)1.11 (0.83–1.49)0.64 (0.20–2.04)