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. 2020 Mar 17;31(5):489–495. doi: 10.1111/pai.13234

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© 2020 The Authors. Pediatric Allergy and Immunology published by John Wiley & Sons Ltd.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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Expiratory variability index (EVI) values with respect to limits of normal, study time points (0W, 2W, 4W) and bronchodilator (BD) use. BD+ and BD− indicate bronchodilator was or was not used, respectively, during the EVI measurement day or night. Numbers within the bars refer to the number of patients in each category. Panel A shows the EVI values presented with respect to the 5th and 10th percentiles of the EVI values of the controls (12.0 and 14.0, respectively). Panel B shows the EVI change from 0W to 4W presented with respect to the 5th and 95th percentiles of the changes in the controls (−3.3 and +3.3, respectively)