Table 2.

HRCT features.

	Fibrosis n = 23	Non Fibrosis n = 67	p value
Patchy GGO	0	12	p<0.001
Diffuse GGO	13	36	p<0.001
Consolidation	2	4	p<0.001
Both	10	32	p<0.001
Anatomic side
Unilateral	0	8	p<0.001
Bilateral	20	61	n.s.
Upper	3	6	p = 0.05
Middle	7	10	p<0.01
Lower	15	25	p = 0.05
Central	7	15	p = 0.05
Peripheral	12	60	p<0.01
Reversed Halo sign	17	53	p<0.01
Halo Sign	6	15	p<0.01
Involved Lobes > 3	17	50	p<0.01
Legenda: GGO = ground glass opacity.