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Declining asthma prevalence in Hong Kong Chinese schoolchildren.
Clin Exp Allergy. 2004 Oct; 34(10):1550-5.CE

Abstract

BACKGROUND

Many studies have reported an increase in the prevalence of asthma and related atopic disorders. The lack of standardized methodologies and 'objective' measurements make reliable comparison and monitoring of trends of asthma very difficult.

METHODS

In this study, a total of 3321 schoolchildren aged 13-14 years were recruited for study using the Phase III Protocol of the International Study of Asthma and Allergic disease in Childhood (ISAAC). The results were compared with those obtained in the Phase I ISAAC study (1994-95), which used the identical and validated core questionnaires.

RESULTS

The prevalence rates of physicians' diagnosis of asthma were similar in the two surveys (11.2% and 10.2%), but the prevalence rates of wheeze (written questionnaire) in the past year have decreased from 12.4% in 1994-95 to 8.7% in 2002 (P<0.001). For the video questionnaire, all asthmatic symptoms in the preceding 12 months were significantly lower in 2002 when compared with those in 1994-95. Among the subjects with diagnosed asthma, the prevalence rates of wheeze in the past 12 months (written questionnaire) has decreased from 39.1% to 27.6% (P<0.001). The prevalence rates of having wheezing attack at least once per month (video questionnaire) has decreased from 10.5% to 5.6% (P=0.013).

CONCLUSION

Using the same standardized and validated ISAAC questionnaire, the prevalence rates of asthma symptoms in Hong Kong Chinese schoolchildren have decreased since 1994. The exact reasons for such trend remain to be explored.

Authors+Show Affiliations

Department of Paediatrics, Prince of Wales Hospital, The Chinese University of Hong Kong, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15479269

Citation

Wong, G W K., et al. "Declining Asthma Prevalence in Hong Kong Chinese Schoolchildren." Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, vol. 34, no. 10, 2004, pp. 1550-5.
Wong GW, Leung TF, Ko FW, et al. Declining asthma prevalence in Hong Kong Chinese schoolchildren. Clin Exp Allergy. 2004;34(10):1550-5.
Wong, G. W., Leung, T. F., Ko, F. W., Lee, K. K., Lam, P., Hui, D. S., Fok, T. F., & Lai, C. K. (2004). Declining asthma prevalence in Hong Kong Chinese schoolchildren. Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, 34(10), 1550-5.
Wong GW, et al. Declining Asthma Prevalence in Hong Kong Chinese Schoolchildren. Clin Exp Allergy. 2004;34(10):1550-5. PubMed PMID: 15479269.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Declining asthma prevalence in Hong Kong Chinese schoolchildren. AU - Wong,G W K, AU - Leung,T F, AU - Ko,F W S, AU - Lee,K K M, AU - Lam,P, AU - Hui,D S C, AU - Fok,T F, AU - Lai,C K W, PY - 2004/10/14/pubmed PY - 2005/2/16/medline PY - 2004/10/14/entrez SP - 1550 EP - 5 JF - Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology JO - Clin Exp Allergy VL - 34 IS - 10 N2 - BACKGROUND: Many studies have reported an increase in the prevalence of asthma and related atopic disorders. The lack of standardized methodologies and 'objective' measurements make reliable comparison and monitoring of trends of asthma very difficult. METHODS: In this study, a total of 3321 schoolchildren aged 13-14 years were recruited for study using the Phase III Protocol of the International Study of Asthma and Allergic disease in Childhood (ISAAC). The results were compared with those obtained in the Phase I ISAAC study (1994-95), which used the identical and validated core questionnaires. RESULTS: The prevalence rates of physicians' diagnosis of asthma were similar in the two surveys (11.2% and 10.2%), but the prevalence rates of wheeze (written questionnaire) in the past year have decreased from 12.4% in 1994-95 to 8.7% in 2002 (P<0.001). For the video questionnaire, all asthmatic symptoms in the preceding 12 months were significantly lower in 2002 when compared with those in 1994-95. Among the subjects with diagnosed asthma, the prevalence rates of wheeze in the past 12 months (written questionnaire) has decreased from 39.1% to 27.6% (P<0.001). The prevalence rates of having wheezing attack at least once per month (video questionnaire) has decreased from 10.5% to 5.6% (P=0.013). CONCLUSION: Using the same standardized and validated ISAAC questionnaire, the prevalence rates of asthma symptoms in Hong Kong Chinese schoolchildren have decreased since 1994. The exact reasons for such trend remain to be explored. SN - 0954-7894 UR - https://www.unboundmedicine.com/medline/citation/15479269/Declining_asthma_prevalence_in_Hong_Kong_Chinese_schoolchildren_ DB - PRIME DP - Unbound Medicine ER -