Woo-Jung Song1, Hyun Jung Kim2, Ji-Su Shim1, Ha-Kyeong Won1, Sung-Yoon Kang1, Kyoung-Hee Sohn1, Byung-Keun Kim3, Eun-Jung Jo4, Min-Hye Kim5, Sang-Heon Kim6, Heung-Woo Park1, Sun-Sin Kim7, Yoon-Seok Chang3, Alyn H Morice8, Byung-Jae Lee9, Sang-Heon Cho10. 1. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea. 2. Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea. 3. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea; Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea. 4. Department of Internal Medicine, Pusan National University College of Medicine, Busan, Korea. 5. Department of Internal Medicine, Ewha Woman's University School of Medicine, Seoul, Korea. 6. Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea. 7. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea; Department of Internal Medicine, Seoul National University Hospital Healthcare System Gangnam Center, Seoul, Korea. 8. Centre for Cardiovascular and Metabolic Research, Hull York Medical School, Castle Hill Hospital, University of Hull, Cottingham, United Kingdom. 9. Division of Allergy, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. Electronic address: leebj@skku.edu. 10. Division of Allergy and Clinical Immunology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea; Institute of Allergy and Clinical Immunology, Seoul National University Medical Research Center, Seoul, Korea. Electronic address: shcho@snu.ac.kr.
Abstract
BACKGROUND: Individual studies have suggested the utility of fractional exhaled nitric oxide (Feno) measurement in detecting cough-variant asthma (CVA) and eosinophilic bronchitis (EB) in patients with chronic cough. OBJECTIVE: We sought to obtain summary estimates of diagnostic test accuracy of Feno measurement in predicting CVA, EB, or both in adults with chronic cough. METHODS: Electronic databases were searched for studies published until January 2016, without language restriction. Cross-sectional studies that reported the diagnostic accuracy of Feno measurement for detecting CVA or EB were included. Risk of bias was assessed with Quality Assessment of Diagnostic Accuracy Studies 2. Random effects meta-analyses were performed to obtain summary estimates of the diagnostic accuracy of Feno measurement. RESULTS: A total of 15 studies involving 2187 adults with chronic cough were identified. Feno measurement had a moderate diagnostic accuracy in predicting CVA in patients with chronic cough, showing the summary area under the curve to be 0.87 (95% CI, 0.83-0.89). Specificity was higher and more consistent than sensitivity (0.85 [95% CI, 0.81-0.88] and 0.72 [95% CI, 0.61-0.81], respectively). However, in the nonasthmatic population with chronic cough, the diagnostic accuracy to predict EB was found to be relatively lower (summary area under the curve, 0.81 [95% CI, 0.77-0.84]), and specificity was inconsistent. CONCLUSIONS: The present meta-analyses indicated the diagnostic potential of Feno measurement as a rule-in test for detecting CVA in adult patients with chronic cough. However, Feno measurement may not be useful to predict EB in nonasthmatic subjects with chronic cough. These findings warrant further studies to validate the roles of Feno measurement in clinical practice of patients with chronic cough.
BACKGROUND: Individual studies have suggested the utility of fractional exhaled nitric oxide (Feno) measurement in detecting cough-variant asthma (CVA) and eosinophilic bronchitis (EB) in patients with chronic cough. OBJECTIVE: We sought to obtain summary estimates of diagnostic test accuracy of Feno measurement in predicting CVA, EB, or both in adults with chronic cough. METHODS: Electronic databases were searched for studies published until January 2016, without language restriction. Cross-sectional studies that reported the diagnostic accuracy of Feno measurement for detecting CVA or EB were included. Risk of bias was assessed with Quality Assessment of Diagnostic Accuracy Studies 2. Random effects meta-analyses were performed to obtain summary estimates of the diagnostic accuracy of Feno measurement. RESULTS: A total of 15 studies involving 2187 adults with chronic cough were identified. Feno measurement had a moderate diagnostic accuracy in predicting CVA in patients with chronic cough, showing the summary area under the curve to be 0.87 (95% CI, 0.83-0.89). Specificity was higher and more consistent than sensitivity (0.85 [95% CI, 0.81-0.88] and 0.72 [95% CI, 0.61-0.81], respectively). However, in the nonasthmatic population with chronic cough, the diagnostic accuracy to predict EB was found to be relatively lower (summary area under the curve, 0.81 [95% CI, 0.77-0.84]), and specificity was inconsistent. CONCLUSIONS: The present meta-analyses indicated the diagnostic potential of Feno measurement as a rule-in test for detecting CVA in adult patients with chronic cough. However, Feno measurement may not be useful to predict EB in nonasthmatic subjects with chronic cough. These findings warrant further studies to validate the roles of Feno measurement in clinical practice of patients with chronic cough.
Authors: Mohamed S Al-Moamary; Sami A Alhaider; Abdullah A Alangari; Mohammed O Al Ghobain; Mohammed O Zeitouni; Majdy M Idrees; Abdullah F Alanazi; Adel S Al-Harbi; Abdullah A Yousef; Hassan S Alorainy; Mohamed S Al-Hajjaj Journal: Ann Thorac Med Date: 2019 Jan-Mar Impact factor: 2.219
Authors: Alyn H Morice; Eva Millqvist; Kristina Bieksiene; Surinder S Birring; Peter Dicpinigaitis; Christian Domingo Ribas; Michele Hilton Boon; Ahmad Kantar; Kefang Lai; Lorcan McGarvey; David Rigau; Imran Satia; Jacky Smith; Woo-Jung Song; Thomy Tonia; Jan W K van den Berg; Mirjam J G van Manen; Angela Zacharasiewicz Journal: Eur Respir J Date: 2020-01-02 Impact factor: 16.671
Authors: Marise J Kasteleyn; Tobias N Bonten; Renée de Mutsert; Willemien Thijs; Pieter S Hiemstra; Saskia le Cessie; Frits R Rosendaal; Niels H Chavannes; Christian Taube Journal: Respir Res Date: 2017-12-07