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

Table 1 Patient characteristics

	Non-smoker	Smoker	p-value
	(n = 27)	(n = 27)	p-value
Age	67.7 ± 11.3	71.8 ± 13.5	p = 0.121
pack-years	0	39.7 ± 16.2	p < 0.001^*
Sex			p < 0.001^*
Male	6	20
Female	21	7
Contrast material			p = 1.000
Enhanced	19	18
Unenhanced	8	9
Histological subtype			p = 1.000
Adenocarcinoma in situ	7	7
Minimally invasive adenocarcinoma	20	20

ISSN: 1471-2342