Table 1 Assignment of variables in the multivariate logistic regression analysis

Preoperative albumin (g/L)

≥35

1

< 35 and ≥ 30

2

< 30

3

Postoperative hemoglobin (g/L)

≥110

1

< 110 and ≥ 90

2

< 90

3

Postoperative albumin(g/L)

≥35

1

< 35 and ≥ 30

2

< 30

3

Decrease in hemoglobin (g/L)

< 10

1

< 20 and ≥ 10

2

< 30 and ≥ 20

3

≥30

4

Decrease in albumin (g/L)

< 5

1

< 10 and ≥ 5

2

< 15 and ≥ 10

3

≥15

4

Number of lymph nodes resected

<25

1

<35 and ≥ 25

2

≥35

3