Table 1.

Clinicopathologic characteristics of the patients

Variable	No. (%)
All patients	361 (100)
Age, years, mean (range)	66.80 (23–89)
Sex
Female	235 (65.1)
Male	126 (34.9)
Stage
IA	321 (88.9)
IB	40 (11.1)
Tumor size, cm, mean (range)	1.57 (0.2–3)
IASLC/ATS/ERS classification
Adenocarcinoma in situ	1 (0.3)
Minimally invasive adenocarcinoma	18 (5.0)
Lepidic predominant	53 (14.7)
Acinar predominant	132 (36.6)
Papillary predominant	71 (19.7)
Micropapillary predominant	24 (6.6)
Solid predominant	62 (17.2)
Presence of histologic patterns
Lepidic	248 (68.7)
Acinar	349 (96.7)
Papillary	270 (74.8)
Micropapillary	169 (46.8)
Solid	151 (41.8)