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Table 5 Relative risk and cumulative relative risk of respiratory disease mortality from different PM2.5 guidelines

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

Guideline

Lag0

95%CI

Lag0-4

95%CI

WHO AQG2021

1.029

(1.011–1.048)

1.042

(1.017–1.048)

WHO AQG2005

1.049

(1.018–1.081)

1.071

(1.029–1.081)

GB Grade I

1.069

(1.025–1.115)

1.100

(1.041–1.115)

GB Grade II

1.153

(1.054–1.262)

1.227

(1.090–1.262)

  1. Note: WHO AQG, The World Health Organization Air Quality Guideline 24-h daily average: 25 μg/m3(2005), 15 μg/m3(2021);
  2. China National Ambient Air Quality Standards (2012)-Chinese 24-h standard, GB Grade I: 35 μg/m3, GB Grade II: 75 μg/m3
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BMC Pulmonary Medicine

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