Table 1.

Summary of clinical and pathological features of the studied oral cavity squamous cell carcinoma cohorts

	Entire cohort N (%)	Modeling set N (%)	Test set N (%)	P-value
No. of patients	115	50	65
Age	61.0 ± 12.0	62.9 ± 13.3	59.5 ± 10.7	0.1545
Sex				0.0006
Female	63 (54.8)	18 (36.0)	45 (69.2)
male	52 (45.2)	32 (64.0)	20 (30.7)
Race				0.8530
White	54 (47.0)	24 (48.0)	30 (46.2)
Other	61 (53.0)	26 (52.0)	35 (53.8)
Smoking				1
Ever	29 (90.6)	16 (94.1)	13 (86.7)
Never	3 (9.4)	1 (5.9)	2 (13.3)
Comorbidity score				0.8263
None/mild	59 (64.8)	26 (52.0)	33 (50.8)
Moderate/severe	32 (35.2)	13 (26.0)	19 (29.2)
Treatment				0.1494
Surgery only	33 (29.7)	11 (22.0)	22 (33.9)
Postoperative or definitive	78 (70.3)	38 (76.0)	40 (61.5)
Pathology histology				0.8262
Well/moderately differentiated	88 (76.5)	39 (78.0)	49 (75.4)
Poorly differentiated	27 (23.5)	11 (22.0)	16 (24.6)
N-stage				0.5492
N0/N1	75 (66.4)	35 (70.0)	40 (61.5)
N2	38 (33.6)	15 (30.0)	23 (35.4)
N-stage				0.7055
N0	55 (48.7)	23 (46.0)	32 (50.8)
N1/N2	58 (51.3)	27 (54.0)	31 (49.2)
T-stage				0.3433
T1/T2	64 (57.1)	26 (52.0)	38 (58.5)
T3/T4	48 (42.9)	24 (48.0)	24 (36.9)
Margin				0.4762
Negative	91 (80.5)	37 (74.0)	54 (83.1)
Positive	22 (19.5)	11 (22.0)	11 (16.9)
Chemotherapy				0.2321
No	78(67.0)	34 (68.0)	44 (67.7)
Yes	22 (33.0)	13 (26.0)	9 (13.9)
Patient status				0.2577
Alive	69 (60.0)	27 (54.0)	42 (64.6)
Dead	46 (40.0)	23 (46.0)	23 (35.4)
Disease recurrence				0.1330
No	85 (73.9)	33 (66.0)	52 (80.0)
Yes	30 (26.1)	17 (34.0)	52 (80.0)

Value in bold is statistically significantly different between the Modeling and Test sets, P < 0.05.