The next two questions are about things in the air you breathe that may make
you ill, not about an illness you can catch from other people, such as a cold
 
Things like dust, mold, smoke, and chemicals inside the home or office can cause
poor indoor air quality. In the past 12 months have you had an illness or
symptom that you think was caused by something in the air at home, office
or other building?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Limit		 Upper 95% Confidence
Limit
Yes 662 15.6 0.7 14.3 17.0
No 3507 84.4 0.7 83.0 85.7

Among all respondents, excluding unknowns and refusals.
 
On Questionnaire Split A