The Usefulness of FEF25-75 in Predicting Airway Hyperresponsiveness to Mannitol
- Authors
- Kim, Youlim; Lee, Hyun; Chung, Sung Jun; Yeo, Yoomi; Park, Tai Sun; Park, Dong Won; Min, Kyung Hoon; Kim, Sang-Heon; Kim, Tae-Hyung; Sohn, Jang Won; Moon, Ji-Yong; Yoon, Ho Joo
- Issue Date
- 2021
- Publisher
- DOVE MEDICAL PRESS LTD
- Keywords
- forced expiratory flow between 25% and 75% of vital capacity; mannitol; bronchial hyperresponsiveness
- Citation
- JOURNAL OF ASTHMA AND ALLERGY, v.14, pp.1267 - 1275
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ASTHMA AND ALLERGY
- Volume
- 14
- Start Page
- 1267
- End Page
- 1275
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/138662
- DOI
- 10.2147/JAA.S318502
- ISSN
- 1178-6965
- Abstract
- Background and Objective: Despite the usefulness of airway hyperresponsiveness (AHR) testing in diagnosing and monitoring asthma, it is challenging to perform in a real-world setting. Forced expiratory flow between 25% and 75% of vital capacity (FEF25-75), a pulmonary measurement that can be obtained easily during routine spirometry, represents the status of medium-sized and small airways. However, the performance of FEF25-75 in predicting AHR has not been well elucidated. Therefore, we investigated whether FEF25-75 can predict AHR to mannitol. Methods: We performed a retrospective cohort study of 428 patients who visited a single clinic due to cough, wheezing, or dyspnea. All patients underwent spirometry with a mannitol provocation test. We compared the area under the curve (AUC) of the percentage of the predicted values of FEF25-75 (FEF25-75 %pred) with that of forced expiratory volume in 1 second (FEV1% pred), FEV1 forced vital capacity (FVC), and FEF25-75/ FVC for predicting AHR. Results: The rate of AHR to mannitol was 20.3%. In the overall study population, the AUC of FEF25-75 %pred for predicting AHR (0.772; 95% confidence interval [CI], 0.729-0.811) was significantly higher than that of FEV1%pred (0.666; 95% CI, 0.619-0.710; p < 0.001), FEV1/FVC (0.741; 95% CI, 0.697-0.782; p = 0.047), and FEF25-75/FVC (0.741, 95% CI = 0.696-0.782, p = 0.046). The sensitivity, specificity, positive predictive value, and negative predictive value of FEF25-75 %pred <81% for predicting AHR in the overall study population were 77.0% (95% CI = 66.8-85.4%), 63.9% (95% CI = 58.6-69.0), 35.3%, and 91.6%, respectively. When we restricted the study group to subjects with normal lung function, the results were similar. Conclusion: Our results indicate that FEF25-75%pred can be used as a surrogate for predicting AHR in patients with respiratory symptoms.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Medicine > Department of Medical Science > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.