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Table 3 Odds ratios (OR) for two-pollutant models including SO2, NO2, and COb

From: Association between gaseous pollutants and emergency ambulance dispatches for asthma in Chengdu, China: a time-stratified case-crossover study

Air pollutants

 

OR

OR 95% CI

Lower bound

Upper bound

SO2

 

1.188a

1.075

1.312

+PM2.5

1.204a

1.058

1.371

+NO2

1.157a

1.004

1.333

+CO

1.193a

1.077

1.321

+O3

1.174a

1.060

1.301

NO2

 

1.115a

1.036

1.200

+PM2.5

1.068

0.960

1.189

+SO2

1.158a

1.042

1.288

+CO

1.115a

1.034

1.202

+O3

1.111a

1.031

1.197

CO

 

1.031a

1.003

1.059

+PM2.5

1.028

1.000

1.057

+SO2

1.029a

1.001

1.058

+NO2

1.027

0.999

1.056

+O3

1.032a

1.004

1.060

  1. Abbreviations: SO2 sulfur dioxide, NO2 nitrogen dioxide, CO carbon monoxide, OR odds ratio, CI confidence interval
  2. aP < 0.05
  3. bORs for SO2, NO2, and CO are derived from 3-, 5-, and 1-day lags, respectively
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Environmental Health and Preventive Medicine

ISSN: 1347-4715

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