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Int J Tuberc Lung Dis. 2012 May;16(5):687-93. doi: 10.5588/ijtld.11.0226.

The challenges of replicating the methodology between Phases I and III of the ISAAC programme.

Collaborators (158)

Aït-Khaled N, Anderson HR, Asher MI, Beasley R, Björkstén B, Brunekreef B, Crane J, Ellwood P, Flohr C, Foliaki S, Forastiere F, García-Marcos L, Keil U, Lai CK, Mallol J, Mitchell EA, Montefort S, Odhiambo J, Pearce N, Robertson CF, Stewart AW, Strachan D, von Mutius E, Weiland SK, Weinmayr G, Williams H, Wong G, Asher MI, Clayton TO, Ellwood E, Ellwood P, Mitchell EA, Stewart AW, Benhabylès B, Melaku K, Esamai FO, Ng'ang'a L, Bouayad Z, Onadeko BO, Zar HJ, Jerray M, Chen YZ, Zhong NS, Pan QL, Lau YL, Wong G, Kartasasmita CB, Odajima H, Teh KH, de Bruyne J, Quah BS, Cua-Lim F, Goh DY, Lee HB, Huang JL, Vichyanond P, Trakultivakorn M, Masjedi MR, al-Momen JA, Montefort S, Mahmood N, Al-Rawas O, Khatav VA, Kumar L, Setty G, Jain KC, Sukumaran TU, Joshi MK, Pherwani AV, Sharma SK, Hanumante NM, Guimaraes IM, Baena-Cagnani CE, Crisci C, Rosário N, Fischer GB, de Britto M, de Freitas Souza L, Solé D, Amarales L, Aguilar P, Calvo MA, Soto-Quirós ME, Romieu I, Cukier G, Guggiari-Chase JA, Chiarella P, Holgado D, Howitt ME, Rennie D, Redding GJ, Priftanji A, Riikjärv MA, Pekkanen J, Gotua M, Svabe V, Kudzyte J, Lis G, Breborowicz A, Deleanu D, Kondiourina EG, Vogt H, Ognev V, Robertson CF, Marks G, Asher MI, Moyes C, Pattemore P, Mackay R, Pearce N, Haidinger G, Weyler J, Standring P, Goulding R, Kramer A, Keil U, Gratziou C, Steriu A, Bonci E, Galassi C, Petronio MG, Chellini E, Bisanti L, Forastiere F, Sestini P, Ciccone G, Piffer S, Camâra R, Rosado Pinto JE, Nunes C, Lopes dos Santos JM, Clancy L, Busquets RM, González Díaz C, García-Marcos L, Arnedo-Pena A, Garcia Hernández G, Guillén-Grima F, Morales-Suarez-Varela MM, Blanco Quirós A, Anderson HR, Austin JB, Shamssain MH, Strachan D, Burr M, Sears M, Anderson HR, Mallol J, Lai CK, Anderson HR, Shah J, Baratawidjaja K, Nishima S, Baeza-Bacab M, Manning P, Khaitov RM, Lee BW, Nilsson L.

Author information

1
Department of Paediatrics: Child and Youth Health, The University of Auckland, Auckland, New Zealand. p.ellwood@auckland.ac.nz

Abstract

BACKGROUND:

The International Study of Asthma and Allergies in Childhood (ISAAC) used standardised methods to examine symptom prevalence of asthma, rhinitis and eczema in adolescents and children between Phases I and III. Centres followed essential rules to ensure comparability of methodology, examined by a centralised data centre.

METHODS:

Centre reports (CRs) were compared for both phases and age groups. Methodological differences were categorised under major deviations (centres excluded), minor deviations (deviations identified in published tables) and very minor deviations (deviations not identified).

RESULTS:

There were 112 CRs for adolescents and 70 for children. Six centres for adolescents and four for children had major deviations and were excluded. Minor deviations (35 for adolescents and 20 for children) were identified in the publications. Very minor deviations (92 for adolescents and 51 for children) were not identified. The odds ratios for having any differences in methodology between phases with a change in Principal Investigator were 0.80 (95%CI 0.36-1.81) for adolescents and 0.91 (95%CI 0.32-2.62) for children.

CONCLUSION:

The majority of the centres replicated the ISAAC methodology to a high standard. Careful documentation of methodology using standardised tools with careful checks allows the full potential of studies such as ISAAC to be realised.

PMID:
22507933
DOI:
10.5588/ijtld.11.0226
[Indexed for MEDLINE]
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