Clinical and Experimental Pediatrics

대한소아청소년과학회 (The Korean Pediatric Society)
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Accuracy of maximal expiratory flow-volume curve curvilinearity and fractional exhaled nitric oxide for detection of children with atopic asthma

  • Park, Sang Hoo (Department of Pediatrics, Medical Research Institute, Chungbuk National University College of Medicine) ;
  • Im, Min Ji (Department of Pediatrics, Medical Research Institute, Chungbuk National University College of Medicine) ;
  • Eom, Sang-Yong (Department of Preventive Medicine, Medical Research Institute, Chungbuk National University College of Medicine) ;
  • Hahn, Youn-Soo (Department of Pediatrics, Medical Research Institute, Chungbuk National University College of Medicine)
  • 투고 : 2017.05.29
  • 심사 : 2017.08.24
  • 발행 : 2017.09.15
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초록

Purpose: Airway pathology in children with atopic asthma can be reflected by the concave shape of the maximal expiratory flow-volume (MEFV) curve and high fractional exhaled nitric oxide (FeNO) values. We evaluated the capacity of the curvilinearity of the MEFV curve, FeNO, and their combination to distinguish subjects with atopic asthma from healthy individuals. Methods: FeNO and angle ${\beta}$, which characterizes the general configuration of the MEFV curve, were determined in 119 steroid-naïve individuals with atopic asthma aged 8 to 16 years, and in 92 age-matched healthy controls. Receiver operating characteristic (ROC) curve analyses were performed to determine the cutoff points of FeNO and angle ${\beta}$ that provided the best combination of sensitivity and specificity for asthma detection. Results: Asthmatic patients had a significantly smaller angle ${\beta}$ and higher FeNO compared with healthy controls (both, P<0.001). For asthma detection, the best cutoff values of angle ${\beta}$ and FeNO were observed at $189.3^{\circ}$ and 22 parts per billion, respectively. The area under the ROC curve for the combination of angle ${\beta}$ and FeNO improved to 0.91 (95% confidence interval [CI], 0.87-0.95) from 0.80 (95% CI, 0.75-0.86; P<0.001) for angle ${\beta}$ alone and 0.86 (95% CI, 0.82-0.91; P=0.002) for FeNO alone. In addition, the combination enhanced sensitivity with no significant decrease in specificity. Conclusion: These data suggest that the combined use of the curvilinearity of the MEFV curve and FeNO is a useful tool to differentiate between children with and without atopic asthma.

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참고문헌

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피인용 문헌

  1. Assessment of bronchial obstruction and its reversibility by shape indexes of the flow‐volume loop in asthmatic children vol.56, pp.1, 2021, https://doi.org/10.1002/ppul.25162