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Communication

Global Asthma Network Phase I Surveillance: Geographical Coverage and Response Rates

1
Department of Paediatrics: Child and Youth Health, Faculty of Medical and Health Sciences, University of Auckland, 1023 Auckland, New Zealand
2
Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
3
Pediatric Allergy and Pulmonology Units, ‘Virgen de la Arrixaca’ University Children’s Hospital, University of Murcia, ARADyAL network and Biomedical Research Institute of Murcia (IMIB-Arrixaca), 30394 Murcia, Spain
4
Biomedical Research Institute of Murcia (IMIB-Arrixaca) and Department of Public Health Sciences, University of Murcia, 30394 Murcia, Spain
5
Centre for Global NCDs, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
6
Population Health Research Institute, St George’s University of London, London SW17 ORE, UK
*
Author to whom correspondence should be addressed.
The GAN Phase I Study Group is listed at the end of the manuscript.
J. Clin. Med. 2020, 9(11), 3688; https://doi.org/10.3390/jcm9113688
Received: 24 September 2020 / Revised: 8 November 2020 / Accepted: 13 November 2020 / Published: 17 November 2020
Background—The Global Asthma Network (GAN) Phase I is surveying school pupils in high-income and low- or middle-income countries using the International Study of Asthma and Allergies in Childhood (ISAAC) methodology. Methods—Cross-sectional surveys of participants in two age groups in randomly selected schools within each centre (2015–2020). The compulsory age group is 13–14 years (adolescents), optionally including parents or guardians. Six to seven years (children) and their parents are also optional. Adolescents completed questionnaires at school, and took home adult questionnaires for parent/guardian completion. Children took home questionnaires for parent/guardian completion about the child and also adult questionnaires. Questions related to symptoms and risk factors for asthma and allergy, asthma management, school/work absence and hospitalisation. Results—53 centres in 20 countries completed quality checks by 31 May 2020. These included 21 centres that previously participated in ISAAC. There were 132,748 adolescents (average response rate 88.8%), 91,802 children (average response rate 79.1%), and 177,622 adults, with >97% answering risk factor questions and >98% answering questions on asthma management, school/work absence and hospitalisation. Conclusion—The high response rates achieved in ISAAC have generally been maintained in GAN. GAN Phase I surveys, partially overlapping with ISAAC centres, will allow within-centre analyses of time-trends in prevalence. View Full-Text
Keywords: global; asthma; surveillance; responses; children; adults’ epidemiology global; asthma; surveillance; responses; children; adults’ epidemiology
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MDPI and ACS Style

Ellwood, P.; Ellwood, E.; Rutter, C.; Perez-Fernandez, V.; Morales, E.; García-Marcos, L.; Pearce, N.; Asher, M.I.; Strachan, D.; on behalf of the GAN Phase I Study Group. Global Asthma Network Phase I Surveillance: Geographical Coverage and Response Rates. J. Clin. Med. 2020, 9, 3688. https://doi.org/10.3390/jcm9113688

AMA Style

Ellwood P, Ellwood E, Rutter C, Perez-Fernandez V, Morales E, García-Marcos L, Pearce N, Asher MI, Strachan D, on behalf of the GAN Phase I Study Group. Global Asthma Network Phase I Surveillance: Geographical Coverage and Response Rates. Journal of Clinical Medicine. 2020; 9(11):3688. https://doi.org/10.3390/jcm9113688

Chicago/Turabian Style

Ellwood, Philippa, Eamon Ellwood, Charlotte Rutter, Virginia Perez-Fernandez, Eva Morales, Luis García-Marcos, Neil Pearce, M I. Asher, David Strachan, and on behalf of the GAN Phase I Study Group. 2020. "Global Asthma Network Phase I Surveillance: Geographical Coverage and Response Rates" Journal of Clinical Medicine 9, no. 11: 3688. https://doi.org/10.3390/jcm9113688

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