Fig. 2.
Changes in pulmonary function according to asthma clusters. a FEV1 % predicted at the time of enrollment. b FEV1 % predicted at the time of follow-up. c FEV1/FVC % predicted at the time of enrollment. d FEV1/FVC % predicted at the time of follow-ups. e FEF25–75% % predicted at the time of enrollment. f FEF25–75% % predicted at the time of follow-ups. * P value < 0.05