Table 2 Surgical and cancer characteristics

0.216^a

 0

5.3

3.3

 I

19.3

25.0

 II

15.8

26.7

 III

31.6

15.0

 IV

28.1

30.0

Infiltrative (%)

75.4

84.6

0.2332^b

<0.0001^a

 0 margin

87.7

31.7

 1 margin

8.8

60.0

 2 margins

3.5

5.0

 3 margins

0

3.3

0.0861^b

 Floor of mouth

42.9

24.3

 Tongue base

28.65

5.4

 Deep margin

14.3

48.6

 Other

14.3

21.6

Margins > 2 mm (%)

83.6

91.7

0.1883^b

Closest margins dimension (mm)

3.949

(3.378; 4.520) 95% CI

2.785

(2.311; 3.258) 95% CI

0.0003^b

Mild dysplasia close to margin (%)

31.6

15.4

0.0475^b

Perineural or perivascular invasion (%)

21.1

29.6

0.2984^b

Positive nodes dissection (%)

40.0

43.2

0.7547^b

Zones for positive nodes (%)

0.8860^a

 I

20.0

15.4

 II

33.3

46.2

 III and further

46.7

38.5

Capsular spreading (%)

15.8 (3/19)

35.3 (6/17)

0.2553^a

Radiation therapy (%)

54.4

35.6

0.04191^b

Radiation +/− Chemotherapy (%)

57.9

47.5

0.2604^b

Time for cancer recurrence (median, days, IQR)

390.2

(234.8; 545.5)

182.5

(80.7; 284.3)

0.0832^b

Follow-up time (median, days IQR)

2162

(1200, 2812)

1093

(532,4; 1444)

0.0100^b

 I

31.25

25

0.0913^a

 II

0

12.5

 III

67.50

25

 IV

31.25

37.5