Table 2.

Characteristics in computed tomography images

Characteristic, n (%)	N = 104 (Analysis set)
	Case n = 21	Control n = 83
Central lesion
No	11 (52)	71 (86)
Yes	10 (48)	12 (14)
Invasion of great arterial vessels
No	18 (86)	80 (96)
Yes	3 (14)	3 (4)
Invasion of great venous vessels
No	19 (90)	82 (99)
Yes	2 (10)	1 (1)
Tumor involvement of peripheral vessels
No	9 (43)	65 (78)
Yes	12 (57)	18 (22)
Tumor cavitation
No	19 (90)	81 (98)
Yes	2 (10)	2 (2)
Tumor exposure in central airway down to segmental bronchi
No	11 (52)	71 (86)
Yes	10 (48)	12 (14)
Esophageal invasion
No	21 (100)	83 (100)
Yes	0 (0)	0 (0)