Table 1—

Definitions of asthma in recent epidemiological studies in schoolchildren

CESAR studyStudies by von Mutius et al. 6, 7ISAAC study 1, 13
Definition of asthmaAsthma ever diagnosed by a doctorReportedNot reportedReported
Asthma ever diagnosed by a doctor or Asthmatic, spastic, or obstructive bronchitis ever diagnosed by a doctorReportedReportedNot reported
  • CESAR: Central European Study of Air Pollution and Respiratory Health

  • ISAAC: International Study of Allergy and Asthma in Childhood