Table 2 Association between clinicopathological parameters and the two groups (LNR, LODDS and pN category) evaluated using Fisher’s test

Age

≥ 60

7

15

7

15

10

12

<  60

5

17

.74

6

16

1.00

8

14

.76

Sex

Male

7

11

9

9

9

9

Female

5

21

.18

4

22

.02

9

17

.36

Pathological T category

T1-T3

5

22

7

20

9

18

T4

7

10

.16

6

11

.52

9

8

.23

Pathological N category

N0

0

26

1

25

N1-N3b

12

6

<.01

12

6

<.01

Pathological stage

I-IVA

9

32

10

31

15

26

IVB

3

0

.02

3

0

.02

3

0

.06

Primary site

Oral

7

21

7

21

10

18

Others

5

11

.73

6

10

.50

8

8

.52

Positive surgical margin

Presence

5

5

4

6

6

4

Absence

7

27

.11

9

25

.45

12

22

.27

Extranodal extension

Presence

3

1

3

1

4

0

Absence

9

31

.06

10

30

.07

14

26

.02

Type of neck dissection

Unilateral

9

27

10

26

13

23

Bilateral

3

5

.66

3

5

.68

5

3

.24

Postoperative treatment

Presence

5

7

4

8

6

6

Absence

7

25

.26

9

23

.73

12

20

.51

Histological classification

MEC

4

11

4

11

6

9

Others

8

21

1.00

9

20

1.00

12

17

1.00

Histological

Low

0

5

0

5

1

4

grade

Others

12

27

.30

13

26

.30

17

22

.63

Perineural

Presence

4

11

3

12

5

10

invasion

Absence

8

21

1.00

10

19

.49

13

16

.53

Vascular

Presence

10

9

9

10

12

7

invasion

Absence

2

23

<.01

4

21

.04

6

19

.01

Worst pattern

1–3

2

10

2

10

3

9

of invasion

4–5

10

22

.46

11

21

.46

15

17

.30

Smoking

Presence

6

12

7

11

9

9

history

Absence

6

20

.51

6

20

.32

9

17

.36

ASA-PS

1

5

12

5

12

8

9

2

7

20

1.00

8

19

1.00

10

17