Figure 3From: Therapeutic efficacy of alpha-1 antitrypsin augmentation therapy on the loss of lung tissue: an integrated analysis of 2 randomised clinical trials using computed tomography densitometry Progression of emphysema in AAT-treated versus placebo-treated subjects (modified ITT). *Estimated treatment difference between mean changes in unadjusted 15th percentile lung density from baseline. AAT: alpha-1 antitrypsin; LS: least squares; PD15: 15th percentile lung density.Back to article page