Impact of HVS on asthma
The number of asthma exacerbations and severe exacerbations during the
previous12 months and the ACT score did not differ between children with
a positive HVT and those with a negative HVT (Table 2). However, ACT
score results were available for only 47 children (42%). Similarly, the
use of oral corticosteroid for asthma exacerbations or the number of
visits to the emergency room for an asthma exacerbation during the last
12 months did not differ between children with a positive and those with
a negative HVT. Lung function (pre-bronchodilator FEV1, reversibility,
RV/TLC ratio) of patients with a positive HVT was identical to that of
children with a negative test.