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Table 3 Incidence density of respiratory symptom episodes and medication use among children 2003–2005

From: Traffic-related air pollution and respiratory symptoms among asthmatic children, resident in Mexico City: the EVA cohort study

 

Asthmatic children

Healthy children

Incidence Ratio

Symptom

events

days

ID*

events

days

ID*

IRR

95% CI

Coughing

3692

22705

16.3

400

7561

5.3

3.1

(2.8, 3.4)

Wheezing

1329

22698

5.9

52

7552

0.7

8.5

(6.4, 11.4)

Use of corticosteroids

2902

22699

12.8

     

Use of bronchodilators

2638

22643

11.7

     
  1. Definition: Incidence density (ID); Incidence density ratio (IRR); Confidence Interval (CI).
  2. * ID (per 100 children).
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Respiratory Research

ISSN: 1465-993X

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