Jan 27, 1999

Prevalence and characteristics of exercise-induced asthma in children

Pediatric Allergy and Immunology : Official Publication of the European Society of Pediatric Allergy and Immunology
F SanoC K Naspitz


We have evaluated the prevalence and the characteristics of exercise-induced asthma (EIA) in a group of 71 patients with a prior history of mild, moderate or severe asthma (42 males and 29 females), aged 6-16 years-old. Measurements of the forced expiratory volume in 1 second (FEV1) were obtained before and at regular intervals up to 8 hours following exercise. As a control, the same patients were evaluated at similar time intervals on another day when they had not been submitted to an exercise challenge. Using pre-exercise FEV1 values as the reference, 32 patients (45.1%) had a positive exercise challenge, defined as a fall in FEV1 value equal to or greater than 15% from baseline following exercise. Among the patients with a positive exercise challenge, the majority (23/32, 71.8%) had an immediate response alone, with no significant changes in FEV1 within the 8-hour follow-up. However, a subgroup of patients (9/32, 28.1%) had both an immediate and a late-phase response to exercise. During the control day, no significant fall in FEV1 were observed. In keeping with previous investigations, no correlation was found between a history of EIA and a positive exercise challenge in the present study. Positive exercise challenges were f...Continue Reading

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Mentioned in this Paper

Asthma, Exercise-Induced
Bronchospasm, Exercise-Induced
Exercise, Isometric
Forced Expiratory Volume Function
Subgroup A Nepoviruses
Pulmonary Function Test/Forced Expiratory Volume 1
Response to Exercise
Circadian Rhythms
IFI6 gene

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