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Table 4 Relative risk and cumulative relative risk of respiratory disease mortality associated with 10 μg/m3 increase in PM2.5 concentration under different multi-pollutant model

From: Acute effect of fine particulate matter and respiratory mortality in Changsha, China: a time-series analysis

Adjusting for pollutants

Lag0

95%CI

Lag0-4

95%CI

PM2.5

 + SO2

1.018

(1.007–1.031)

1.024

(1.007–1.042)

 + NO2

1.019

(1.007–1.032)

1.032

(1.015–1.051)

 + O3

1.019

(1.006–1.031)

1.026

(1.009–1.044)

 + SO2 + NO2

1.019

(1.006–1.032)

1.029

(1.011–1.048)

 + SO2 + O3

1.018

(1.005–1.031)

1.023

(1.005–1.043)

 + NO2 + O3

1.019

(1.006–1.032)

1.031

(1.011–1.050)

 + SO2 + NO2 + O3

1.019

(1.006–1.032)

1.029

(1.010–1.049)

  1. Note: The correlation coefficient between PM2.5 and PM10 is greater than 0.7 (0.871), considering the collinearity problem, we did not add PM10 to the multi-pollutant model for analysis
  2. The analyses were adjusted for time trends, temperature, relative humidity, weekend, and holiday by using the distributed lag non-linear model
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BMC Pulmonary Medicine

ISSN: 1471-2466

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