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Exercise-induced bronchoconstriction among Malay schoolchildren.

N M Zainudin1, B A Aziz, A L Haifa

  • 1Department of Paediatrics, Institut Pediatrik, Hospital Kuala Lumpur, Malaysia. norzila@crc.jaring.my

Respirology (Carlton, Vic.)
|June 26, 2001
PubMed
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Exercise-induced bronchoconstriction (EIB) is common in asthmatic children, even in humid climates. This study found a significant prevalence of EIB in Malaysian schoolchildren, challenging previous assumptions about humidity

Area of Science:

  • Pediatric Respiratory Medicine
  • Environmental Health
  • Clinical Immunology

Background:

  • Exercise-induced bronchoconstriction (EIB) is prevalent in asthmatic children in temperate climates, with lower rates postulated in high humidity.
  • Understanding EIB prevalence in diverse climates is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To determine the prevalence of EIB in schoolchildren with wheezing symptoms living in Kuala Lumpur, Malaysia, a region with a humid tropical climate.
  • To investigate the potential influence of high humidity on EIB occurrence in this population.

Main Methods:

  • A cross-sectional study involving 7-12-year-old Malay schoolchildren in Kuala Lumpur.
  • Utilized the International Study of Asthma and Allergies in Childhood questionnaire to identify children with asthma symptoms.

Related Experiment Videos

  • Exercise challenge tests were administered to children with and without a history of wheeze, with humidity and temperature recorded.

    • Main Results:

    • The prevalence of EIB was 47.7% in children with a history of wheeze and 51.6% in those with current wheeze.
    • A lower prevalence of 7.5% was observed in control children without wheeze history.
    • No significant relationship was found between varying humidity levels (41-90%) and the prevalence of EIB.

    Conclusions:

    • Exercise-induced bronchoconstriction is demonstrably present in asthmatic children residing in a highly humid tropical environment.
    • The findings suggest that high humidity does not preclude the occurrence of EIB in susceptible children.