Table 1 Baseline characteristics

Age (years), mean ± SD

65.63 ± 3.71

Sex

 Male

21 (70 %)

 Female

9 (30 %)

Comorbidity

 Hypertension

3 (10 %)

 Diabetes mellitus

2 (6.7 %)

 COPD

1 (3.3 %)

 Lacunar infarction

2 (6.7 %)

ASA score

 1

2 (6.7 %)

 2

28 (93.3 %)

pStage

 I

2 (6.7 %)

 IIa

4 (13.3 %)

 IIb

6 (20.0 %)

 IIIa

11 (36.7 %)

 IIIb

7 (23.3 %)

Tumor location

 Upper

16 (53.4 %)

 Middle

13 (43.3 %)

 Lower

1 (3.3 %)

Histology

 Squamous carcinoma

28 (93.3 %)

 Adenocarcinoma

2 (6.7 %)