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Prevalence of allergic diseases of schoolchildren in central taiwan. From ISAAC surveys 5 years apart.
J Asthma. 2009 Aug; 46(6):541-5.JA

Abstract

The prevalence of allergic disorders is increasing around the world. This study used the standardized written questionnaire from International Study of Asthma and Allergies in Childhood (ISAAC, phase III) to collect two cross-sectional appraisals of schoolchildren 5 years apart-one performed 2002 and another on 2007, to focus on the secular trends in prevalence of allergies in central Taiwan. This questionnaire was administered to schoolchildren from over 46 schools across Changhwa County in 2002, and again in 2007. The present study is a follow-up study and uses data collected from a previously reported study conducted in the year 2002 of the same location using the same methodology. Although the repeated cross-sectional survey after a 5-year lapse suggests a mere increase of diagnosed asthma cases from 7.1% to 7.4%, the prevalence of its related symptoms--nocturnal cough, rhinitis, and eczema--was found to increase significantly by 2.6% (p < 0.0001), 6.8% (p < 0.001), and 5.9% (p < 0.001), respectively. Additionally, comparing the secular trends in asthma prevalence, rhinitis, and eczema between several polluted areas in Changhwa County with its less polluted neighbors in 2002 and 2007 indicates that schoolchildren in TaiHao area, which is noted to be polluted by a petrochemical company, has a significantly increased prevalence of wheezing (3.7%, p < 0.05) and nocturnal cough (3.6%, p < 0.05). For schoolchildren living in the coastal areas, a 6% (p < 0.05) increase in the prevalence of rhinitis is noted. The prevalence of eczema uniformly increased for all areas of Changhwa County (p < 0.01). In the downtown areas, besides eczema, the prevalence of asthma and rhinitis also increased significantly (p < 0.05). Of note is the consistent finding in these two periods of the higher prevalence of childhood asthma, rhinitis, and eczema in the downtown areas compared with that from both the polluted and coastal areas. The secular trends in prevalence of asthma, rhinitis, and eczema in these two periods seem to correlate to environmental factors. While the symptoms of asthma, rhinitis, and eczema in schoolchildren affected boys more than girls, it is observed that affected girls have more marked manifestations, although it did not reach statistical significance.

Authors+Show Affiliations

Department of Pediatrics, Han-Ming Hospital, Changhwa, Taiwan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19657892

Citation

Liao, Mei-Fen, et al. "Prevalence of Allergic Diseases of Schoolchildren in Central Taiwan. From ISAAC Surveys 5 Years Apart." The Journal of Asthma : Official Journal of the Association for the Care of Asthma, vol. 46, no. 6, 2009, pp. 541-5.
Liao MF, Liao MN, Lin SN, et al. Prevalence of allergic diseases of schoolchildren in central taiwan. From ISAAC surveys 5 years apart. J Asthma. 2009;46(6):541-5.
Liao, M. F., Liao, M. N., Lin, S. N., Chen, J. Y., & Huang, J. L. (2009). Prevalence of allergic diseases of schoolchildren in central taiwan. From ISAAC surveys 5 years apart. The Journal of Asthma : Official Journal of the Association for the Care of Asthma, 46(6), 541-5. https://doi.org/10.1080/02770900902795546
Liao MF, et al. Prevalence of Allergic Diseases of Schoolchildren in Central Taiwan. From ISAAC Surveys 5 Years Apart. J Asthma. 2009;46(6):541-5. PubMed PMID: 19657892.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Prevalence of allergic diseases of schoolchildren in central taiwan. From ISAAC surveys 5 years apart. AU - Liao,Mei-Fen, AU - Liao,Mei-Nan, AU - Lin,Shoou-Nan, AU - Chen,Jing-Yi, AU - Huang,Jing-Long, PY - 2009/8/7/entrez PY - 2009/8/7/pubmed PY - 2009/8/25/medline SP - 541 EP - 5 JF - The Journal of asthma : official journal of the Association for the Care of Asthma JO - J Asthma VL - 46 IS - 6 N2 - The prevalence of allergic disorders is increasing around the world. This study used the standardized written questionnaire from International Study of Asthma and Allergies in Childhood (ISAAC, phase III) to collect two cross-sectional appraisals of schoolchildren 5 years apart-one performed 2002 and another on 2007, to focus on the secular trends in prevalence of allergies in central Taiwan. This questionnaire was administered to schoolchildren from over 46 schools across Changhwa County in 2002, and again in 2007. The present study is a follow-up study and uses data collected from a previously reported study conducted in the year 2002 of the same location using the same methodology. Although the repeated cross-sectional survey after a 5-year lapse suggests a mere increase of diagnosed asthma cases from 7.1% to 7.4%, the prevalence of its related symptoms--nocturnal cough, rhinitis, and eczema--was found to increase significantly by 2.6% (p < 0.0001), 6.8% (p < 0.001), and 5.9% (p < 0.001), respectively. Additionally, comparing the secular trends in asthma prevalence, rhinitis, and eczema between several polluted areas in Changhwa County with its less polluted neighbors in 2002 and 2007 indicates that schoolchildren in TaiHao area, which is noted to be polluted by a petrochemical company, has a significantly increased prevalence of wheezing (3.7%, p < 0.05) and nocturnal cough (3.6%, p < 0.05). For schoolchildren living in the coastal areas, a 6% (p < 0.05) increase in the prevalence of rhinitis is noted. The prevalence of eczema uniformly increased for all areas of Changhwa County (p < 0.01). In the downtown areas, besides eczema, the prevalence of asthma and rhinitis also increased significantly (p < 0.05). Of note is the consistent finding in these two periods of the higher prevalence of childhood asthma, rhinitis, and eczema in the downtown areas compared with that from both the polluted and coastal areas. The secular trends in prevalence of asthma, rhinitis, and eczema in these two periods seem to correlate to environmental factors. While the symptoms of asthma, rhinitis, and eczema in schoolchildren affected boys more than girls, it is observed that affected girls have more marked manifestations, although it did not reach statistical significance. SN - 1532-4303 UR - https://www.unboundmedicine.com/medline/citation/19657892/Prevalence_of_allergic_diseases_of_schoolchildren_in_central_taiwan__From_ISAAC_surveys_5_years_apart_ L2 - https://www.tandfonline.com/doi/full/10.1080/02770900902795546 DB - PRIME DP - Unbound Medicine ER -