Table 2 Patient characteristics before and after the matched-pair analysis

Sex

Male/female

108/107

45/56

0.345^a

38/38

34/42

0.516^a

Age, years

< 20/20–40/40–60/> 60

Mean, SD

39/101/54/21

34.7, 16.3

11/24/39/27

47.2, 19.1

< 0.001 ^b

15/21/26/16

41.3, 18.5

8/23/26/19

45.9, 19.2

0.797^b

FNCLCC grade

Grade 2/grade 3

4/211

8/93

0.009

2/74

4/72

0.405

Depth

Superficial/deep

20/195

25/76

< 0.001^a

13/63

14/62

0.882^a

Location

Trunk/head and neck/upper extremity/lower extremity

71/7/37/100

22/0/19/60

0.035^a

17/0/19/40

8/0/17/41

0.927^a

Length of tumor, cm

< 5/5–10/10–15/> 15

Median, IQR

65/96/46/8

6.8, 3.6

52/33/8/8

5.4, 3.9

< 0.001^b

35/29/8/4

6.1, 3.9

36/28/8/4

5.4, 3.5

0.999^b

Stage

I/II/III

4/94/117

8/63/30

0.07^a

2/45/29

1/48/27

0.882^a

Subtype

Monophasic/biphasic/unclassified

102/63/50

51/26/24

0.799

39/17/20

38/19/19

0.985^a

Surgical Margin

Wide/marginal/intralesional

185/20/10

83/15/3

0.286

62/12/2

64/9/3

0.719

Adjuvant radiotherapy

Yes/no

41/174

15/86

0.360

4/72

3/73

0.699