Do you think severe headache with no known cause
are symptoms of a stroke?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Limit
Upper 95% Confidence
Limit
Yes 2590 79.1 1.0 77.2 81.0
No 630 20.9 1.0 19.0 22.8

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