Table 3 RRs for two-pollutant models including PM_2.5, SO₂, NO₂, CO, and O₃^b

PM_2.5

1.027 ^a

1.010

1.044

+SO₂

1.017

0.995

1.039

+NO₂

1.013

0.986

1.039

+CO

1.050 ^a

1.023

1.078

+O₃

1.019 ^a

1.001

1.037

SO₂

1.043 ^a

1.021

1.064

+PM_2.5

1.038 ^a

1.010

1.067

+NO₂

1.024

0.993

1.057

+CO

1.041 ^a

1.015

1.068

+O₃

1.036 ^a

1.014

1.058

NO₂

1.036 ^a

1.017

1.056

+PM_2.5

1.030 ^a

1.000

1.061

+SO₂

1.022

0.993

1.052

+CO

1.047 ^a

1.020

1.074

+O₃

1.025 ^a

1.005

1.046

CO

1.027 ^a

1.006

1.048

+PM_2.5

1.004

0.972

1.038

+SO₂

1.002

0.976

1.028

+NO₂

0.993

0.964

1.023

+O₃

1.019

0.998

1.041

O₃

1.074 ^a

1.036

1.113

+PM_2.5

1.060 ^a

1.021

1.101

+SO₂

1.057 ^a

1.018

1.098

+NO₂

1.055 ^a

1.016

1.097

+CO

1.070 ^a

1.032

1.110