Table 1.
Data collection details in each study centre
|
13–14-years age group |
6–7-years age group |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Principal investigator | GAN response rate, %* | Mean data collection date* | Years between Phases† | Principal investigator | GAN response rate, %* | Mean data collection date* | Years between Phases† | ||
| Africa and Eastern Mediterranean | |||||||||
| Nigeria (Ibadan) | A Falade | 85·0% | May, 2018 | 16·7 | .. | .. | .. | .. | |
| South Africa (Cape Town) | H J Zar | 84·4% | August, 2017 | 15·2 | .. | .. | .. | .. | |
| Sudan (Khartoum) | M Nour | 99·9% | March, 2017 | 14·1 | .. | .. | .. | .. | |
| Syria (Lattakia) | G Dib | 99·6% | April, 2019 | 17·3 | Y Mohammad | 93·0% | May, 2019 | 16·2 | |
| Region total | .. | .. | December, 2017 | 15·7 | .. | .. | May, 2019 | 16·2 | |
| Americas | |||||||||
| Chile (South Santiago) | J Mallol | 81·9% | March, 2015 | 13·3 | .. | .. | .. | .. | |
| Costa Rica (Costa Rica) | M Soto-Martinez | 67·5% | February, 2018 | 16·1 | M Soto-Martinez | 64·5% | January, 2018 | 16·0 | |
| Ecuador (Quito) | A Cabrera Aguilar | 100·0% | April, 2019 | 15·9 | .. | .. | .. | .. | |
| Mexico (Ciudad Victoria) | R García-Almaráz | 82·3% | December, 2015 | 12·7 | R García-Almaráz | 81·5% | February, 2016 | 12·9 | |
| Mexico (Mexicali) | J V Mérida-Palacio | 83·7% | April, 2016 | 13·7 | J V Mérida-Palacio | 77·0% | March, 2016 | 13·3 | |
| Mexico (Mexico City [North Area]) | B E Del Río Navarro | 93·8% | September, 2015 | 12·9 | B E Del Río Navarro | 86·7% | June, 2016 | 13·6 | |
| Mexico (Monterrey) | S N González-Díaz | 88·0% | December, 2017 | 16·7 | .. | .. | .. | .. | |
| Mexico (Toluca Urban Area) | E M Navarrete-Rodriguez | 98·1% | October, 2015 | 13·1 | E M Navarrete-Rodriguez | 95·7% | April, 2016 | 13·5 | |
| Nicaragua (Managua) | J F Sánchez | 90·5% | November, 2018 | 16·5 | J F Sánchez | 87·9% | November, 2018 | 16·4 | |
| Region total | .. | .. | December, 2016 | 14·5 | .. | .. | January, 2017 | 14·4 | |
| Europe | |||||||||
| Spain (A Coruña) | A López-Silvarrey Varela | 92·1% | January, 2019 | 15·2 | A López-Silvarrey Varela | 71·0% | January, 2019 | 15·3 | |
| Spain (Bilbao) | C González Díaz | 91·1% | September, 2018 | 16·8 | C González Díaz | 55·2% | August, 2018 | 16·7 | |
| Spain (Cartagena) | L García-Marcos | 73·8% | January, 2016 | 13·9 | L García-Marcos | 65·9% | January, 2016 | 14·0 | |
| Region total | .. | .. | December, 2017 | 15·4 | .. | .. | November, 2017 | 15·3 | |
| South-East Asia and Western Pacific | |||||||||
| India (Bikaner) | M Sabir | 90·1% | November, 2017 | 16·3 | .. | .. | .. | .. | |
| India (Chandigarh) | M Singh | 100·0% | October, 2017 | 15·9 | .. | .. | .. | .. | |
| India (Jaipur) | V Singh | 98·7% | November, 2017 | 16·3 | V Singh | 75·8% | November, 2017 | 16·3 | |
| India (Kottayam) | T U Sukumaran | 85·3% | October, 2017 | 15·3 | T U Sukumaran | 68·4% | December, 2017 | 15·5 | |
| India (Lucknow) | S Awasthi | 94·0% | October, 2017 | 16·0 | S Awasthi | 91·3% | October, 2017 | 15·9 | |
| India (New Delhi) | S K Kabra | 100·0% | November, 2017 | 16·0 | S K Kabra | 80·9% | January, 2018 | 16·1 | |
| India (Pune) | S Salvi | 99·6% | October, 2017 | 15·9 | S Salvi | 79·8% | October, 2017 | 15·9 | |
| New Zealand (Auckland) | M I Asher | 85·5% | October, 2018 | 16·7 | M I Asher | 63·7% | July, 2018 | 16·4 | |
| Taiwan (Taipei) | J-L Huang | 93·0% | October, 2017 | 15·8 | J-L Huang | 76·3% | October, 2017 | 15·8 | |
| Thailand (Bangkok) | S Chinratanapisit | 97·9% | September, 2017 | 16·1 | S Chinratanapisit | 86·3% | August, 2017 | 16·1 | |
| Region total | .. | .. | November, 2017 | 16·0 | .. | .. | November, 2017 | 16·0 | |
| World total | .. | .. | August, 2017 | 15·4 | .. | .. | August, 2017 | 15·3 | |
The Athens centre is not presented because its ISAAC data are from Phase I alone; the Chandigarh centre is not presented in the 6–7-years age group because its ISAAC data are from Phase I alone. For the 13–14-years age group, methodology notes for centres with GAN Phase I data alone are the following: no date of birth on the questionnaire (Ibadan, Taipei); response rate lower than 80% (Costa Rica, Cartagena); age and birth date showed high inconsistencies (Quito); fewer than ten schools used when ten or more schools were available (Ciudad Victoria, Mexico City [north area], Toluca Urban Area, Auckland, Bangkok); only age was reported reliably (Monterrey); single data entry (Monterrey); no age on the questionnaire (Chandigarh, New Delhi); questionnaires completed at home by parents (Kottayam); and more than 20% of questionnaires missing age and date of birth (Bangkok). For the 6–7-years age group, methodology notes for centres with GAN Phase I data alone are the following: response rate lower than 70% (Costa Rica, Bilbao, Cartagena, Kottayam, Auckland); no date of birth on the questionnaire (Taipei); no age on the questionnaire (New Delhi); fewer than ten schools used when ten or more schools were available (Bangkok); and more than 20% of questionnaires missing age and date of birth (Bangkok). GAN=Global Asthma Network. ISAAC=International Study of Asthma and Allergies in Childhood.
GAN Phase I.
ISAAC Phase III to GAN Phase I.