Symptoms associated with

Exposed (n = 21)

Unexposed (n = 50)

OR (95% CI)*

Eye irritation or inflammation

9

10

3.0 (0.9 - 9.1)

COPD

7

9

2.3 (0.7 - 7.3)

Bronchoconstriction

14

11

7.1 (2.3 - 21.9)