Table 1 Basic characteristics of patients

Gender (M/F)

2/9

8/2

0.009*

Age

64.0

66.2

0.721

BMI (kg/m²)

21.9

20.7

0.18

Operative time (h)

10.1

12.1

0.002*

Hospitalization (days)

14.0

14.8

0.805

Clinical stage

 IV

 Recurrent

8

3

10

0

0.214

0.214

Preoperative treatment

 CT

2

1

1.000

 RT

3

1

0.587

Flap donor site managements

Primary closure

Primary closure

–

Defect size (cm²)

30.3

29.7

0.707

Flap size (cm²)

96.7

180

0.013*

Comorbidities

 Hypertension

5

8

0.183

 Diabetes mellitus

3

3

1.000

 Betel nut

4

6

0.396

 Smoking

7

8

0.635

 Alcohol

7

7

1.000

 Chronic kidney disease

2

1

1.000

 Postoperative RT (n)

10

10

1.000