Key points are not available for this paper at this time.
Definition of abbreviation: n/a = not available.Asthma was diagnosed by either methacholine hyperresponsiveness or bronchodilator responsiveness.*Age, body mass index, and spirometry data are presented as mean 6 SD.† Sputum cell count data is presented as the median (range).
Lachowicz-Scroggins et al. (2016) studied this question.