Morphological factors differentiating between early lung adenocarcinomas appearing as pure ground-glass nodules measuring ≤10 mm on thin-section computed tomography

Table 1 Variables that significantly differed among the AAH, AIS and MIA groups

Variable	AAH (n = 40)	AIS (n = 95)	MIA (n = 70)	PValue
Maximum diameter^a (mm)	6.4 ± 1.3	7.4 ± 1.6	7.7 ± 1.5	<0.00001
Mean CT value^a (HU)	−586 ± 113	−581 ± 101	−532 ± 101	0.005
Interface^b (coarse/smooth)	6/34	34/61	32/38	0.005
Air bronchogram^b (yes/no)	2/38	24/71	18/52	0.02

P <0.05 was considered significant. ^aData are presented as mean ± SD. ^bData are presented as number of lesions. Age, sex, slight lobulation, spiculation, spine-like process, vascular convergence and pleural retraction are not listed because they did not significantly differ among the three groups.

ISSN: 1470-7330