CEACAM5 and pulmonary emphysema: (5) Y2 = 0.649 × age + 0.015 × smoking + 0.744 × nodule size + 27.613 × emphysema + 38.335 × vascular sign + 12.643 × burr + 8.244 × (CYFRA21-1) − 0.464 × CEA + 0.301 × (miRNA-21-5p) − 0.151 × (miRNA-574-5p) − 98.349.