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Table 2 The estimates of RR (95%CI) for asthma hospitalizations using different exposure-response functions

From: The effect and burden modification of heating on adult asthma hospitalizations in Shijiazhuang: a time-series analysis

 

PM2.5

PM10

SO2

NO2

CO

O3

heating season

 per 10μg/m3 increasea

1.006

1.003

1.011

1.018

1.002

0.991

(1.005,1.008)

(1.003,1.004)

(1.008,1.014)

(1.014,1.023)

(1.002,1.003)

(0.987,0.995)

 NAAQS grade IIb

1.043

1.022

1.147

1.118

1.061

0.864

(1.021,1.066)

(0.981,1.064)

(1.075,1.224)

(1.061,1.179)

(1.014,1.111)

(0.810,0.922)

non-heating season

 per 10μg/m3 increase

1.007

1.005

1.02

1.016

1.006

1.006

(1.004,1.010)

(1.003,1.007)

(1.011,1.029)

(1.007,1.026)

(1.002,1.009)

(1.001,1.010)

 NAAQS grade II

1.092

1.133

1.28

1.13

1.26

1.101

(1.024,1.164)

(1.050,1.222)

(1.094,1.498)

(1.043,1.223)

(1.103,1.440)

(1.007,1.203)

  1. aper 0.1 mg/m3 for CO and estimated from the linear exposure-response function
  2. bestimated from the non-linear exposure-response function versus null exposure
  3. CI confidence interval