Adenocarcinoma in situ and minimally invasive adenocarcinoma in lungs of smokers: image feature differences from those in lungs of non-smokers

Table 2 Radiological and pathological findings

	Non-smoker	Smoker	p-value
	(n = 27)	(n = 27)	p-value
Longest diameter of the entire lesion (mm)
CT measurement	14.6 ± 4.7	17.1 ± 4.0	p = 0.036^*
Pathological measurement	12.4 ± 4.5	16.3 ± 5.5	p = 0.008^*
Longest diameter of solid/invasive component (mm)
CT measurement	2.2 ± 2.7	2.4 ± 2.9	p = 0.975
Pathological measurement	2.3 ± 1.9	2.1 ± 1.7	p = 0.740
Internal CT value (HU)
CT value of entire lesion	− 536 ± 105	− 594 ± 78	p = 0.036^*
CT value of ground-glass opacity	− 549 ± 126	− 611 ± 105	p = 0.040^*

If the radiologist concluded that there was no solid component, the diameter of solid component was calculated as 0 mm. for pathological measurement, invasive component of AIS was calculated as 0 mm by definition
Values are shown as means ± standard deviations
HU Hounsfield unit
^*Significant difference

ISSN: 1471-2342