Table 1 Patient characteristics

Sex ratio (M/F)

71/45

68/48

0.688^a

Age (years)

64 ± 11

61 ± 16

0.310^a

Body mass index (kg/m²)

24.1 ± 5.0

23.3 ± 3.1

0.315^a

ASA grade

0.652

  I

42 (36.2)

39 (33.6)

  II

36 (31.0)

45 (38.8)

  III

33 (28.5)

28 (24.1)

  IV

5 (4.3)

4 (3.5)

Tumor distance from AV (cm)

0.311^a

  0–5 cm

37 (31.9)

30 (25.9)

  5.1–12 cm

79 (68.1)

86 (74.1)

Preoperative staging

0.861^a

  I

32 (24.1)

30 (25.9)

  II

41 (31.9)

45 (38.8)

  III

43 (33.6)

41 (35.3)

Neoadjuvant CRT

33(28.4)

28 (24.1)

0.456