6-8세 소아에서 항원 감작과 기관지 과민성의 관계
The Relationship between Allergen Sensitization and Bronchial Hyperresponsiveness in Children Aged 6-8 Years
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목 적 : 기관지 과민성에 대한 위험 인자를 확인하는 것은 천식의 원인을 이해하는 데 중요하다. 기관지 과민성은 아토피와 관계 있는 것으로 알려져 있다. 저자들은 피부단자시험의 항원을 5군으로 분류하여 각각의 항원군과 기관지 과민성과의 관계를 다른 혼란 변수를 고려하여 조사하였다.방 법 : 급성 또는 만성 호흡기 증상으로 외래를 방문한 6-8세 소아 407명을 대상으로 하였다. 이 중 229명은 기관지 천식으로 진단을 받았다. 모든 연구 대상은 메타콜린 흡입유발시험, 피부단자시험을 시행받았다. PC20 ≤8 mg/mL을 기관지 과민성이 있는 것으로 간주하였다. 각각의 항원군과 기관지 과민성 사이의 독립적인 관계를 평가하기 위해 다중 로짓 회귀 분석을 이용하였다.결 과 : 항원을 총 5군으로 분류하여 각각의 항원군과 기관지 과민성과의 관계를 성별, 연령, 폐기능, 총 IgE치, 나머지 다른 항원군을 보정하여 조사한 결과, 전체 환자에서 집먼지진드기(OR=1.64, 95% CI=1.02-2.65)와 화분(OR=3.47, 95% CI=1.18-10.17)이 기관지 과민성과 연관성이 있었다. 천식 환자에서는 집먼지진드기(OR= 2.53, 95% CI=1.11-5.77)만이 기관지 과민성과 유의한 연관성을 보였다.결 론:본 연구 결과는 이 연령의 호흡기 증상이 있는 환자, 천식 환자 모두에서 집먼지진드기가 기관지 과민성의 위험 인자임을 제시하는 소견이다.
Abstract
Purpose : The identification of risk factors for bronchial hyperresponsiveness(BHR) is important in furthering the understanding of the cause of asthma. BHR is known to be related to atopy. We investigated the relations of BHR to sensitization to the five allergen groups in children aged 6-8 years. Methods : Four hundred and seven 6-8 year old children with acute or chronic respiratory symptoms were enrolled. Each subject underwent methacholine bronchial challenge and skin-prick tests with airbone allergens. BHR was defined as PC20≤8 mg/mL methacholine. Multiple logistic regression analysis was performed to study the independent relationship between BHR and sensitization to individual allergen group. Results : The significant associations between BHR and skin-test response were against house dust mites(odds ratio=1.64, 95% confidence interval=1.02-2.65) and pollen(3.47, 1.18- 10.17) in total subjects, all after adjustment by sex, age, FEV1/FVC, total IgE, and a positive response to any of the other four allergen groups measured. In subjects with asthma, the significant association between BHR and positive skin-test response was observed only for house dust mites(2.53, 1.11-5.77). Conclusion : BHR was found to be related to atopy against house dust mite and pollen in subjects with respiratory symptoms, and against only house dust mites in subjects with asthma. These findings suggest atopy, especially against house dust mites, is an important risk factor for bronchial hyperresponsiveness in this age group.
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