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KMID : 0390020110210010024
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Pediatric Allergy and Respiratory Disease
2011 Volume.21 No. 1 p.24 ~ p.31
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Relevance of Exhaled Nitric Oxide Levels to Asthma Control Test Scores and Spirometry Values in Children with Atopic Asthma
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Kim Jeong-Ok
Woo Sung-Il
Hahn Youn-Soo
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Abstract
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Purpose: Fractional exhaled nitric oxide (FeNO) has been proposed as a tool for assessing airway inflammation in patients with atopic asthma. We evaluated the relationship between FeNO with asthma control test (ACT) scores and spirometry values in children with atopic asthma.
Methods: One hundred twenty-six children with atopic asthma, 8-16 years of age, were included in the study. None of the participants received regular controller therapy for at least 4 weeks before the study. The ACT (for children >12 years of age) or the Childhood Asthma Control Test (C-ACT; for children between the ages of 8 and 11 years of age), FeNO measurements and pulmonary function tests were performed.
Results: The geometric mean of the FeNO in children with atopic asthma (16.1 parts per billion [ppb]; 95% CI, 14.5-17.8 ppb) was significantly higher than that healthy controls (7.5 ppb; 95% CI, 7.0-8.1 ppb; P<0.001). ACT or C-ACT scores were >20 in 82% of enrolled patients and correlated with the %FEV1, FEV1/FVC, and %FEF25-75. However, FeNO was not related to %FEV1, FEV1/FVC, %FEF25-75, and scores for asthma controls. FeNO levels in asthmatic children were not significantly different with respect to age, gender, BMI, and tobacco exposure.
Conclusion: FeNO was not related to the spirometry values and scores for asthma control. Measurement of FeNO may be a complementary tool in the assessment of asthma control.
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KEYWORD
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Asthma, Child, FeNO, Spirometry, Asthma control test
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