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Table 4 Results of adjusted Generalized Additive Model and the effect of pollutants on respiratory deaths in men (for 1 unit increase in CO and 10 units increase in all other pollutants)

From: The relation between air pollution and respiratory deaths in Tehran, Iran- using generalized additive models

 

Lag

df

RR

95% CI for RR

P-Value

Lag 0

O3 (ppb)

7.19

1.03

1.00–1.07

0.037

CO (ppm)

4.88

0.98

0.94–1.01

0.235

NO2 (ppb)

2.33

1.03

1.00–1.06

0.045

SO2 (ppb)

1

0.96

0.92–1.01

0.093

PM10 (μg/m3)

7.50

1.03

1.02–1.05

< 0.001

PM2.5 (μg/m3)

3.92

1.02

0.97–1.08

0.156

Lag 1

O3 (ppb)

3.20

1.03

0.99–1.06

0.100

CO (ppm)

6.45

0.97

0.94–1.01

0.107

NO2 (ppb)

4.47

1.04

1.00–1.06

0.019

SO2 (ppb)

3.15

0.95

0.91–0.99

0.032

PM10 (μg/m3)

6.69

1.02

1.01–1.04

< 0.001

PM2.5 (μg/m3)

4.95

1.04

1.02–1.07

0.003

Lag 2

O3 (ppb)

3.31

1.00

0.97–1.04

0.394

CO (ppm)

4.85

0.96

0.93–1.00

0.073

NO2 (ppb)

4.15

1.03

1.00–1.07

0.028

SO2 (ppb)

1.30

0.95

0.91–0.99

0.030

PM10 (μg/m3)

6.49

1.02

1.01–1.03

0.002

PM2.5 (μg/m3)

2.09

1.04

1.02–1.05

0.014

Lag 3

O3 (ppb)

3.92

1.03

0.99–1.06

0.053

CO (ppm)

5.60

1.07

0.99–1.08

0.488

NO2 (ppb)

2.79

1.02

0.99–1.06

0.125

SO2 (ppb)

8.21

0.94

0.91–0.99

0.016

PM10 (μg/m3)

6.43

1.02

1.01–1.03

0.004

PM2.5 (μg/m3)

2.41

1.05

0.99–1.10

0.051

Mean Lag 4–8

O3 (ppb)

3.33

1.03

0.99–1.06

0.066

CO (ppm)

5.52

1.03

0.99–1.07

0.311

NO2 (ppb)

2.54

1.02

0.99–1.06

0.116

SO2 (ppb)

2.82

0.97

0.92–1.01

0.117

PM10 (μg/m3)

6.47

1.00

0.99–1.01

0.089

PM2.5 (μg/m3)

3.84

0.93

0.89–0.98

0.011