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Korean Journal of Preventive Medicine 1998;31(3): 361-371.
Reliability and Validity of the Korean Version of ISAAC Questionnaire.
Seong Woo Choi, Yeong Su Ju, Dae Sung Kim, Jae Yong Kim, Ho Jang Kwon, Dae Hee Kang, Sang Il Lee, Soo Hun Cho
1Department of Preventive Medicine, Dankook University College of Medicine, Korea.
2Department of Preventive Medicine, Seoul National University College of Medicine, Korea.
3Department of Pediatics, Sungkyunkwan University College of Medicine, Korea.
Recent increases of asthma and allergies in childhood made the need for a standardized approach to international and regional comparisons of their prevalence and severity. To address these issues, "International Study of Asthma and Allergies in Childhood (ISAAC)" is currently underway. In Korea, "Nationwide Study of Asthma and Allergies in Korean Children" began in 1995 according to ISAAC protocol. ISAAC written and video questionnaires were used in this survey, but their reliability and validity were not evaluated properly yet. In this study, our aim was to evaluate the reliability and validity of two kinds of questionnaires and their usefulness in international and regional comparisons. The test and retest of two questionnaires were completed by male(n=110) and female(n=111) middle school students with two and three weeks interval each. Kappa(or weighted kappa) were calculated from each questions and validity coefficients were estimated from those statistics. In Korean version of written questionnaire, the questions for allergic rhinitis, atopic dermatitis, allergic conjunctivitis, and food allergy proved to have high kappa values(or weighted kappa values) and validity coefficients and they can be used in further studies without any correction. But some questions about asthma(especially nocturnal cough, wheezing in exercise, and severe asthma) and drug allergy need to be revised for better understanding to study subjects. Video questionnaire has the same degree of reliability and validity when compared to written questionnaire and this is the unexpected result. Accordingly, it also need to be revised to overcome the racial and cultural differences of the study subjects. In conclusion, the Korean version of written and video questionnaires may be considered to be useful methods in international and regional comparisons of asthma and allergic diseases in childhood after correction of some questions.
Key words: ISAAC; questionnaire; reliability; validity
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