Table 3.

Main radiologic findings

Vascular signs and peripheral nodules—number of lobes involved
	Present	1	2	3	4	5
Vascular tree in bud—no (%)	75 (54%)	7 (9.3%)	26 (34.7%)	23 (30.7%)	9 (12%)	10 (13.3%)
Vascular enlargement pattern—no (%)	108 (77.7%)	3 (2.8%)	24 (22.2%)	26 (24.1%)	17 (15.7%)	38 (35.2%)
Peripheral nodules—no (%)	24 (17.3%)	2 (8.3%)	10 (41.7%)	9 (37.5%)	3 (12.5%)	0 (0%)

Vascular signs and peripheral nodules—distribution and localization
	Distribution			Localization
	Anterior	Intermediate	Posterior	Inside GGO	Outside GGO	Both
Vascular tree in bud (n = 75)—no (%)	43 (57.3%)	59 (78.7%)	38 (50.7%)	63 (84%)	0 (0%)	12 (16%)
Vascular enlargement pattern (n = 108)—no (%)	74 (68.5%)	89 (82.4%)	80 (74.1%)	66 (61.1%)	5 (4.6%)	37 (34.3%)
Peripheral nodules (n = 24)—no (%)	12 (50%)	20 (83.3%)	9 (37.5%)	16 (66.7%)	2 (8.3%)	6 (25.0%)

Ground glass opacities, crazy paving and consolidations—visual extension and distribution
	Present	1–25%	26–50%	51–75%	76–100%	Main distribution (A/P/D)
Ground glass opacities—no (%)	131 (94.2%)	49 (37.4%)	35 (26.7%)	31 (23.7%)	16 (12.2%)	A - 21 (16%) P - 4 (3.1%) D - 106 (80.9%)
Crazy paving—no (%)	71 (51.1%)	37 (52.1%)	15 (21.1%)	15 (21.1%)	4 (5.6%)	A - 14 (19.7%) P - 9 (12.7%) D - 48 (67.6%)
Consolidations—no (%)	120 (86.3%)	76 (63.3%)	35 (29.2%)	5 (4.2%)	4 (3.3%)	A - 5 (4.2%) P - 89 (74.2%) D - 26 (21.7%)

Other radiologic findings
	TIB (n = 75)	No TIB (n = 64)	p	VEP (n = 108)	No VEP (n = 31)	p
Pleural effusion—n (%)			0.467*			0.260*
Monolateral	6 (8%)	2 (3.1%)		5 (4.6%)	3 (9.7%)
Bilateral	7 (9.3%)	6 (9.4%)		12 (11.1%)	1 (3.2%)
Pulmonary artery enlargement (> 29 mm)—n (%)	52 (69.3%)	23 (35.9%)	< 0.001	60 (55.6%)	15 (48.4%)	0.480

Main distribution: A anterior, P posterior, D diffuse

Significant p values are reported in bold. *Refers to the p value of the Chi-square test for the whole contingency table for the variable taken into account