PURPOSE: To determine the prevalence and severity of exercise-induced bronchospasm (EIB)among school-aged children in a government elementary school in Metro Manila.
METHODS: This is a descriptive cross-sectional study involving diagnosed asthmatic and asymptomatic/(never been diagnosed to be asthmatic) school-aged children aged eight to twelve years old from July 2006 up to March 2007 done at the St. Luke's Medical Center using a standardized exercise bronchial challenge testing by running in an electric driven treadmill. Drop in the forced expiratory volume at one minute (FEV1) were measured at intervals using a portable spirometer. T-test was used to determine differences between groups. EIB was diagnosed among those with a drop of more than 15% in FEV1 at 15-minute post-exercise challenge.
RESULTS: Ten out of 51 (20%) subjects were diagnosed to have EIB. Seven out of 10 (70%) of these were asymptomatic and never been diagnosed to be asthmatic. Among the asymtomatic group, mean FEV1 at the 15-minute and 30-minute interval showed statistically significant difference among those with and without EIB.
CONCLUSION: 20% of these school-aged children have exercise-induced bronchospasm. This condition was undiagnosed in 70% of asymptomatic school-aged children. A standardized exercise test can be an objective tool in identifying school-aged children with EIB which is of utmost importance in their proper medical guidance and treatment.
CLINICAL IMPLICATIONS: Health professionals should be made aware that normal children can develop symptoms of EIB during and after exercise hence measures to recognize this clinical entity must be properly instituted in order to maximize their potential physical functional capacity.
DISCLOSURE: Dahlia Yu, No Financial Disclosure Information; No Product/Research Disclosure Information