Table 1

Characteristics of participating children at entry to the study

Symptoms in past 12 months
 Episodes of wheeze
 Breathlessness due to wheeze3329
 Sleep disturbed by cough more than once per week3127
Current treatment
 β2 agonist + inhaled corticosteroid7768
 β2 agonist + sodium cromoglycate109
 β2 agonist only1917
Atopic status
 Positive skin prick test to one or more of house dust mite, grass pollen or cat7263