Do you think shortness of breath is a symptom of a heart attack?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Limit
Upper 95% Confidence
Limit
Yes 3705 87.9 0.7 86.5 89.3
No 258 6.2 0.5 5.2 7.1
Don't know/not sure 229 6.0 0.6 4.8 7.1

Among all respondents, excluding refusals.
 
On Questionnaire Split B