Skip to main content

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