Have you ever been told by a doctor or health professional that you have
chronic obstructive pulmonary disease (COPD), emphysema or chronic bronchitis?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Upper 95% Confidence
Yes 225 4.2 0.4 3.5 4.9
No 3803 95.8 0.4 95.1 96.5

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