Things like smog, automobile exhaust, and chemicals can cause outdoor air
pollution. In the past 12 months have you had an illness or symptom that you
think was caused by pollution in the air outdoor?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Upper 95% Confidence
Yes 291 6.1 0.4 5.3 6.9
No 3889 93.9 0.4 93.1 94.7

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