Table 1 Demographic features of patients stratified by age at diagnosis.

Features	n	%		75–79	80–84		85–102	P
Features	n	%		n	n		n	P
Gender								0.000
Male	534		50.2	241	180		113
Female	530		49.8	197	162		171
Race								0.098
Caucasian	930		87.4	373	297		260
Asian	93		8.7	44	34		15
African American	41		3.9	21	11		9
Stage								0.002
I–II	701		65.9	263	234	204
III–IV	363		34.1	175	108	80
T classification								0.327
T1	532		50.0	224	171	137
T2	338		31.8	125	117	96
T3	115		10.8	47	33	35
T4a	76		7.1	40	20	16
T4b	3		0.3	2	1	0
N classification								0.060
N0	803		75.5	314	260	229
N1	121		11.4	68	34	19
N2a	4		0.4	1	1	2
N2b	107		10.1	44	36	27
N2c	23		2.2	10	8	5
N3	6		0.6	1	3	2
Grade								0.306
1	297		27.9	113	94	90
2	579		54.4	248	180	151
3	188		17.7	77	68	43
Surgery therapy								0.000
Yes	885		83.2	379	287	219
No	179		16.8	59	55	65
Tumor location								0.683
Dorsal surface of tongue	53		5.0	23	14	16
Border of tongue	214		20.1	89	67	58
Ventral surface of tongue	124		11.7	58	36	30
Anterior 2/3 of tongue	295		27.7	115	107	73
Overlapping lesion of tongue	57		5.4	23	14	20
Tongue anterior, NOS	321		30.2	130	104	87

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