Range of prevalence for common outcomes related to asthma from the first European Community Respiratory Health Survey

  Minimum (%) Median (%) Maximum (%) Fold range*
Sensitivity to common allergens 16.2 33.1 44.5 3
Nasal allergies/hayfever 9.5 20.9 40.9 4
Wheeze 4.1 20.7 32.0 8
PD20 <1mg methacholine 3.4 13.0 27.8 8
Waking with breathlessness 1.5 7.3 11.4 8
On current asthma medication 0.6 3.5 9.8 16