Donate to support our work
Global Asthma Network Logo Global Asthma Network Global Asthma Network Logo
  • The Global Asthma Network strives for a world where no-one suffers from asthma

  • The Global Asthma Network is the asthma surveillance hub for the world

  • The Global Asthma Network researches ways of reducing the burden of asthma

  • The Global Asthma Network promotes access to appropriate asthma management

  • The Global Asthma Network stimulates and encourages capacity building in LMICs

  • The Global Asthma Network strives to ensure access to quality-assured essential asthma medications

  • The Global Asthma Network raises the profile of asthma as a major NCD


GAN Phase I Calculation of symptom prevalences

Calculation of symptom prevalences using the core GAN questionnaires (Asthma, Rhinitis, Eczema) for 13-14 years, 6-7 years and the adult group.

Unless otherwise specified, the denominator for each condition is the number of participants who returned a valid questionnaire. Valid is defined as having responded to at least one of the core questions for either Asthma Rhinitis or Eczema. For further detail on these calculations, contact

Significant studies with global surveillance data for asthma include the International Study of Asthma and Allergies in Childhood (ISAAC), for children and the European Community Respiratory Health Survey (ECRHS) and World Health Survey for adults. Data from all these studies are contained in the Global Asthma Report 2011.