During the last 12 months/one year, have you experienced any of the following?
Literal question
Have you had an attack of shortness of breath that came on without obvious cause when you were not exercising or not doing some physical activity?
Categories
Value
Category
1
yes
2
no
Sysmiss
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.