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Table 5 Cox proportional hazard ratios for non-accidental mortalitya and PM2.5 NO2, O3, and OX, and multiple-pollutant models

From: Low concentrations of fine particle air pollution and mortality in the Canadian Community Health Survey cohort

    95% CI    
  Pollutant HR Lower Upper -2 LL SBC AIC
PM2.5 PM2.5 1.03 1.01 1.05 755,760.2 756,453.5 755,888.2
O3 O3 1.05 1.03 1.07 755,742.1 756,435.4 755,870.1
NO2 NO2 1.03 1.02 1.05 755,756.9 756,450.3 755,884.9
OX b OX 1.06 1.04 1.09 755,734.0 756,427.3 755,862.0
PM2.5 and O3 PM2.5 1.01 1.00 1.03    
  O3 1.05 1.03 1.07 755,740.0 756,444.2 755,870.0
PM2.5 and NO2 PM2.5 1.02 1.00 1.04    
  NO2 1.03 1.01 1.05 755,753.4 756,457.6 755,883.4
PM2.5 and OX b PM2.5 1.01 0.99 1.03    
  OX 1.06 1.04 1.09 755,733.7 756,437.9 755,863.7
PM2.5, O3 and NO2 PM2.5 1.00 0.98 1.02    
  O3 1.05 1.03 1.07    
  NO2 1.03 1.01 1.05 755,732.5 756,447.5 755,864.5
  1. ahazard ratios are per increase in inter-quartile range: PM2.5 2.80 μg/m3, O3 10.20 ppb, NO2 6.63 ppb, OX 8.05 ppb
  2. bthe combined oxidant capacity of NO2 and O3