Table 3 Prognostic factors for disease-free survival of the patients

Age (years)

  ≤ 10

Ref

Ref

 ˃ 10

1.67 (0.812–3.423)

0.164

0.75 (0.363–1.557)

0.443

Sex

 Male

Ref

Ref

 Female

1.14 (0.601–2.155)

0.691

0.89 (0.469–1.702)

0.731

Type of salivary gland

 Major

Ref

Ref

 Minor

2.77 (1.085–7.093)

0.033

1.36 (0.137–0.942)

0.037

Tumor behavior

 Benign

Ref

Ref

 Malignant

3.13 (1.658–5.900)

 < 0.001

1.82 (0.729–0.990)

0.023

Duration of illness (months)

  ≤ 10

Ref

Ref

 ˃ 10

1.58 (0.0829–3.012)

0.165

0.88 (0.392–1.983)

0.760

Tumor size (cm)

  ≤ 10

Ref

Ref

 ˃ 10

1.99 (0.834–4.750)

0.121

1.46 (0.587–3.622)

0.417

Presence of ulceration

 Yes

2.51 (0.191–0.680)

0.002

0.55 (0.260–1.225)

0.148

 No

Ref

Ref