Table 1

Prevalence (%) of reported respiratory symptoms

Symptom questionPrevalence
Have you had an attack of shortness of breath that came on following strenuous activity at any time during the last 12 months?25.7
Do you ever have trouble with breathing?19.5
Have you had wheeze or whistling in your chest at any time in the last 12 months?24.0
Do you usually cough during the day, or at night, during the winter, and do you usually cough like this for as much as 3 months of the year?9.3