Fig. 4From: A randomized, double-blinded, double-dummy efficacy and safety study of budesonide–formoterol Spiromax® compared to budesonide–formoterol Turbuhaler® in adults and adolescents with persistent asthmaMean change in trough FEV1. BF budesonide–formoterol, FEV 1 forced expiratory volume in 1 s, SD standard deviation. a n = 290 at baseline; dropped to n = 276 by week 12. b n = 284 at baseline, dropped to n = 264 by week 12Back to article page