Table 2 Comparison of CT features between L-PLADC and D-PLADC

Distribution

 Single lobe

131/131 (100%)

36/117 (21.1%)

–

  Right upper lobe

49/131 (37.4%)

6/117 (5.1%)

–

  Right middle lobe

12/131 (9.2%)

0/117 (0%)

–

  Right lower lobe

22/131 (16.8%)

14/117 (12.0%)

–

  Left upper lobe

35/131 (26.7%)

6/117 (5.1%)

–

  Left lower lobe

13/131 (9.9%)

10/117 (8.5%)

–

 Right multiple lobes

0/131 (0%)

20/117 (17.1%)

 Left multiple lobes

0/131 (0%)

5/117 (4.3%)

–

 Bilateral multiple lobes

0/131 (0%)

56/117 (47.9%)

–

Interlobular fissure bulging

8/131 (6.1%)

48/117 (41.0%)

< 0.001^a

Hypodense sign ^b

22/82 (26.8%)

79/88 (89.8%)

< 0.001^a

Air space

40/131 (30.5%)

68/117 (58.1%)

< 0.001^a

Irregular air bronchogram

90/131 (68.7%)

81/117 (69.2%)

0.928 ^a

CT angiogram sign ^b

22/82 (21.8%)

79 /88 (89.8%)

< 0.001^b

GGO

101/131 (77.1%)

94/117 (80.3%)

0.534^a

Coexisting nodules

15/131 (11.5%)

73/117 (62.4%)

< 0.001^a

Pleural retraction

102/131 (77.9%)

8/117 (6.8%)

< 0.001^a

Pleural effusion

6/131 (4.6%)

72/117 (61.5%)

< 0.001^a

Lymphadenopathy

13/131 (9.9%)

53/117 (45.3%)

< 0.001^a