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• W2023501904 abstract "Abstract Background Childhood asthma prevalence is widely measured by parental proxy report of physician-diagnosed asthma in questionnaires. Our objective was to validate this measure in a North American population. Methods The 2884 study participants were a subsample of 5619 school children aged 5 to 9 years from 231 schools participating in the Toronto Child Health Evaluation Questionnaire study in 2006. We compared agreement between questionnaire diagnosis and a previously validated health claims data diagnosis. Sensitivity, specificity and kappa were calculated for the questionnaire diagnosis using the health claims diagnosis as the reference standard. Results Prevalence of asthma was 15.7% by questionnaire and 21.4% by health claims data. Questionnaire diagnosis was insensitive (59.0%) but specific (95.9%) for asthma. When children with asthma-related symptoms were excluded, the sensitivity increased (83.6%), and specificity remained high (93.6%). Conclusions Our results show that parental report of asthma by questionnaire has low sensitivity but high specificity as an asthma prevalence measure. In addition, children with asthma-related symptoms may represent a large fraction of under-diagnosed asthma and they should be excluded from the inception cohort for risk factor studies." @default.
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• W2023501904 date "2011-11-22" @default.
• W2023501904 modified "2023-10-07" @default.
• W2023501904 title "Verifying a questionnaire diagnosis of asthma in children using health claims data" @default.
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• W2023501904 doi "https://doi.org/10.1186/1471-2466-11-52" @default.
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