Table 1 Perioperative characteristics of the study cohort

Age, median (IQR), years

64 (56,69)

Sex, male, n (%)

99 (59.6%)

Back pain, n (%)

26 (15.7%)

Loss of weight, n (%)

64 (38.6%)

BMI, mean ± SD, kg/m²

22.16 ± 2.95

Albumin, median (IQR), g/L

41.6 (37.1, 45.0)

CA19-9, median (IQR), U/mL

152.3 (31.7, 522.6)

PNI, median (IQR)

49.6 (44.1, 53.1)

CK-MB, median (IQR), IU/L

14.4 (11.0, 17.9)

CK, median (IQR), IU/L

63.0 (45.8, 84.3)

Sarcopenia, n (%)

70 (42.2%)

TNM stage

 Stage I, n (%)

50 (30.1%)

 Stage II, n (%)

70 (42.2%)

 Stage III, n (%)

46 (27.7%)

Tumor site

 Head or neck, n (%)

115 (69.3%)

 Body or tail, n (%)

51 (30.7%)

Differentiation of tumor

 Poor, n (%)

17 (11.1%)

 Moderate, n (%)

129 (84.3%)

 Well, n (%)

7 (4.6%)

Vascular invasion, n (%)

53 (31.9%)

Lymphatic invasion, n (%)

77 (46.4%)

Margin, R0 resection, n (%)

157 (98.7%)

Postoperative chemotherapy, n (%)

137 (82.5%)