Table 1. Clinical characteristic of the patients.

Variablea	No. [%] (N=116)
Age	55.2 [27–84], 56.0±11.4
Sex, female	100 [86]
Height, cm	157.8 [140.3–179], 158.5±7.1
Weight, kg	55.8 [41.1–75.6], 55.4±7.3
Body mass index, kg/m2	22.2 [16.6–27.8], 22.0±2.3
Smoking	8 [7]
Preoperative CT finding
Lung ground glass nodules	76 [66]
Lung solitary nodules/masses	38 [33]
Interstitial lung disease	2 [2]
Lung nodule/mass size on CTb
<10 mm	77 [62]
≥10 mm but <20 mm	42 [34]
≥20 mm	6 [5]
Pulmonary function test, %
Forced vital capacity	106 [47–141], 107±16
Forced expiratory volume in 1 second	105 [45–172], 106±19
Comorbidity
Extrathoracic malignancy	28 [24]
Hypertension	16 [14]
Diabetes mellitus	11 [9]
Cardiac disease	7 [6]
Asthma or COPD	8 [7]
ASA physical status class
1	32 [28]
2	63 [54]
3	21 [18]

^a, continuous data are shown as median [range] and mean ± standard deviation, and categorical data as number [%]; ^b, CT identification of 125 nodules in 116 patients. CT, computed tomography.