Table 1 Patients’ characteristics

Age: median (minimum–maximum), years

59 (48–67)

63 (51–74)

0.615^a

Gender: female/male

21/30

23/29

0.754^b

Histology: adenocarcinoma/squamous cell carcinoma

38/13

44/8

0.203^b

TNM stage: II/III

23/28

18/34

0.277^b

Vascular invasion: present/absent

19/32

12/40

0.117^b

Tumor size: < 3 cm/> 3 cm

25/26

30/22

0.378^b

Tumor number: single/multiple

33/18

40/12

0.172^b

Anesthesia duration: median (minimum–maximum), minutes

226 (168–422)

238 (184–454)

0.475^a