Table 1. Characteristics of the patients.

Variable	Segmentectomy (n=173)	Wedge resection (n=181)	P value
Age (years, mean ± SD)	57.2±8.9	62.6±10.2	0.01
Sex (male/female)	65/108	70/111	0.61
Comorbidity	52 (30.1%)	70 (38.7%)	0.31
COPD	9	11
Hypertension	15	21
Diabetes mellitus	16	18
Stroke	3	9
Coronary artery disease	8	8
Renal dysfunction	1	3
Noguchi type			0.11
A, B	77 (44.5%)	88 (48.6%)
C, D, E	96 (55.5%)	93 (51.4%)
Tumor type			0.32
GGO type	102 (59.0%)	99 (54.7%)
Solid type	71 (41.0%)	82 (45.3%)
Tumor size (cm, mean ± SD)	1.3±0.5	1.2±0.5	0.21
Tumor location			0.77
Left upper lobe	49	51
Left lower lobe	44	44
Right upper lobe	33	35
Right middle, lower lobe	47	51

COPD, chronic obstructive pulmonary disease; GGO, Ground glass opacity.