Fig. 4From: Baseline characteristics from a 3-year longitudinal study to phenotype subjects with COPD: the FOOTPRINTS studyCentrilobular emphysema on CT (A) and CT images showing typical emphysema findings for each category i) absent, ii) mild, iii) moderate, iv) confluent, v) advanced destructive (B). Percentages do not total 100% due to missing data (missing: EwAL, 3.3%; GOLD 1, 2.5%; GOLD 2, 1.6%; GOLD 3, 3.9%; A1ATD, 10.5%)Back to article page