Table 1 Demographic characteristics of the patient population by PTHrP expression

Age

<60y

54 (58%)

2.757 ± 0.391

0.6775^a

≥60y

39 (42%)

2.723 ± 0.391

Gender

Male

49 (52.7%)

2.353 ± 0.459

0.5592^a

Female

44 (47.3%)

2.283 ± 0.633

Smoking history

No

62 (66.7%)

2.706 ± 0.460

0.5850^a

Yes

31 (33.3%)

2.754 ± 0.352

Alcohol history

No

74 (79.6%)

2.755 ± 0.382

0.4071^a

Yes

19 (20.4%)

2.671 ± 0.436

TNM stage

I/II

48 (51.6%)

2.380 ± 0.558

0.7570^a

III/IV

45 (48.4%)

2.346 ± 0.515

Disease site

Tongue

64 (68.8%)

2.348 ± 0.540

0.4972^b

Base of tongue

7(7.5%)

2.407 ± 0.480

cheek

11(11.8%)

2.231 ± 0.514

gingiva

9(9.7%)

2.478 ± 0.607

Orthers (lip, floor of mouth)

2 (2.2%)

2.732 ± 0.458

Lymph node metastasis

pN0

64 (68.8%)

2.740 ± 0.392

0.8158^a

pN1-pN2

29 (31.2%)

2.761 ± 0.393

Pathological differentiation

I

54 (58.1%)

2.189 ± 0.540

0.0001^a

II/III

39 (41.9%)

2.610 ± 0.434