|
KMID : 1225720150070040404
|
|
Allergy, Asthma & Immunology Research : AAIR
2015 Volume.7 No. 4 p.404 ~ p.408
|
|
|
Fractional Exhaled Nitric Oxide: Comparison Between Portable Devices and Correlation With Sputum Eosinophils
|
|
Yune Se-Hyo
Lee Jin-Young
Choi Dong-Chull
Lee Byung-Jae
|
|
|
Abstract
|
|
|
|
This study was performed to compare the 2 different portable devices measuring fractional exhaled nitric oxide (FeNO) and to see the correlation between FeNO and induced sputum eosinophil count (ISE). Forty consecutive subjects clinically suspected to have asthma underwent FeNO measurement by NIOX-MINO® and NObreath® concurrently. All also had induced sputum analysis, methacholine provocation test or bronchodilator response test, and spin prick test. Agreement between the 2 devices was evaluated. The correlation between FeNO and ISE was assessed, as well as the cut-off level of FeNO to identify ISE ≥3%. The intraclass correlation coefficient (ICC) between FeNO levels measured by NIOX-MINO® (FeNONIOX-MINO) and NObreath® (FeNONObreath) was 0.972 with 95% confidence interval of 0.948-0.985. The 95% limits of agreement were -28.9 to 19.9 ppb. The correlation coefficient between ISE and FeNONIOX-MINO was 0.733 (P<0.001), and 0.751 between ISE and FeNONObreath (P<0.001). The ROC curve found that the FeNONIOXMINO of 37.5 ppb and the FeNONObreath of 36.5 ppb identified ISE ≥3% with 90% sensitivity and 81% specificity. Age, sex, body mass index, smoking history, atopy, and the presence of asthma did not affect the FeNO level and its correlation with ISE. The NIOX-MINO ® and NObreath® agree with each other to a high degree. Both devices showed close correlation with ISE with similar cut-off value in identifying ISE ≥3%.
|
|
|
KEYWORD
|
|
|
Asthma, nitric oxide, electrochemical technique, eosinophils, sputum
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
   
|
|