Table 4 Effect of tumor markers and clinical factors on survival

c-kit

0, 1+

1

0.297 - 4.251

0.864

2+, 3+

1.124

EGFR

0

1

0.206 - 2.957

0.716

1+, 2+

0.781

VEGF

0, 1+

1

0.624 - 11.392

0.198

2+, 3+

2.623

Sex

Male

1

0.01 - 0.639

0.17

Female

0.8

Site

Submandibular gland

1

Parotid gland

0

0.995

Minor salivary gland

0.33

0.07 - 1.563

0.162

Perineural invasion

Negative

1

0.491- ~ 7.02

0.362

Positive

1.856

Resection margin

Negative

1

0.173 - 2.505

0.54

Positive

0.659

Lymph node involvement

Negative

1

0.791 - 14.06

0.049

Positive

4.362

Treatment

Surgery only

1

Surgery + RT

0.224

0.033 - 1.508

0.124

Surgery + CCRT

0.831

0.113 - 6.127

0.856

Age (year)

<45

1

≥45

1.078

1.016 ~ 1.143

0.103

Tumor size (cm)

≤2

1

>2

0.838

0.452 ~ 1.554

0.575