The impact of the method of consent on response rates in the ISAAC time trends study.
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item.
When enough users have cast their vote on this item, the average rating will also be shown.
Your vote was cast
Thank you for your feedback
Thank you for your feedback
MetadataShow full item record
JournalInternational Journal of Tuberculosis and Lung Disease
AbstractBACKGROUND: Centres in Phases I and III of the International Study of Asthma and Allergies in Childhood (ISAAC) programme used the method of consent (passive or active) required by local ethics committees. METHODS: Retrospectively, relationships between achieved response rates and method of consent for 13-14 and 6-7-year-olds (adolescents and children, respectively), were examined between phases and between English and non-English language centres. RESULTS: Information was obtained for 113 of 115 centres for adolescents and 72/72 centres for children. Both age groups: most centres using passive consent achieved high response rates (>80% adolescents and >70% children). English language centres using active consent showed a larger decrease in response rate. Adolescents: seven centres changed from passive consent in Phase I to active consent in Phase III (median decrease of 13%), with five centres showing lower response rates (as low as 34%). Children: no centre changed consent method between phases. Centres using active consent had lower median response rates (lowest response rate 45%). CONCLUSION: The requirement for active consent for population school-based questionnaire studies can impact negatively on response rates, particularly English language centres, thus adversely affecting the validity of the data. Ethics committees need to consider this issue carefully.
Attribution-NonCommercial-ShareAlike 3.0 United States
The following license files are associated with this item:
- Worldwide time trends for symptoms of rhinitis and conjunctivitis: Phase III of the International Study of Asthma and Allergies in Childhood.
- Authors: Björkstén B, Clayton T, Ellwood P, Stewart A, Strachan D, ISAAC Phase III Study Group.
- Issue date: 2008 Mar
- [Prevalence of symptoms of asthma, allergic rhinitis, conjunctivitis and atopic eczema: ISAAC (International Study of Asthma and Allergies in Childhood) in a population of schoolchildren in Zagreb].
- Authors: Stipić-Marković A, Pevec B, Pevec MR, Custović A
- Issue date: 2003
- The International Study of Asthma and Allergies in Childhood (ISAAC). ISAAC Steering Committee.
- Authors: Asher MI, Weiland SK
- Issue date: 1998 Nov
- International study of asthma and allergies in childhood: phase 3 in the Syrian Arab Republic.
- Authors: Mohammad Y, Tabbah K, Mohammad S, Yassine F, Clayton T, Hassan M
- Issue date: 2010 Jul
- [Time trends in the prevalence of asthma and allergic diseases over 7 years among adolescents in Guangzhou city].
- Authors: Wang HY, Zheng JP, Zhong NS
- Issue date: 2006 Apr 18