R A Shaw|Julian Crane|Neil Pearce|Carl Burgess|Peter Bremner|Kate Woodman|Richard Beasley
Comparison of a video questionnaire* with the IUATLD written questionnaire for measuring asthma prevalence
video questionnaire vq measuring asthma prevalence adolescents assessed repeatability validity relation bronchial hyperresponsiveness bhr pd20 less equal 78 mumol methacholine comparison also made standard self completed written questionnaire sq based iuatld bronchial symptoms questionnaire included five questions seeking comparable data vq vq sq administered 707 schoolchildren 1316 years english primary language one hundred six randomly selected children subsequently underwent bronchial challenge methacholine sensitivity specificity bhr higher combination three positive responses vq 073 088 sq 063 082 although differences statistically significant p 024 administered two week interval vq significantly higher p 003 coefficient repeatability 079 sq 050 conclude vq valid reliable method determining asthma prevalence propose providing data relatively free biases due language culture literacy interviewing techniques may particularly useful comparing asthma prevalence severity different populations