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 279 5.1 0.4 4.4 5.9
No 3922 94.9 0.4 94.1 95.6

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