Variable

Aging

% (n)

Young-adult

%(n)

p-value

Bronchial wall thickening

16.8 (16)

24.0 (6)

0.011

Bronchial dilation

14.7 (14)

16.0 (4)

0.015

Centrilobular nodule

4.2 (4)

0.0 (0)

-

Dilation of the pulmonary artery

33.8 (8)

50.0 (4)

0.399