Table 1.

Patient and tumor characteristics by age group

	Age <70 y		Age 70–79 y		Age ≥80 y
Patient characteristics	n	%	n	%	n	%	P value
Sex							<.0001
Male	11,616	64.5	2671	52.7	1084	39.3
Female	6390	35.5	2393	47.3	1675	60.7
Race							<.0001
White	15,735	87.4	4603	90.9	2583	93.6
Black	1262	7.0	208	4.1	84	3.0
Other	1009	5.6	253	5.0	92	3.3
Year of diagnosis							.06
2004–2006	5118	28.4	1486	29.3	747	27.1
2007–2009	5918	32.9	1695	33.5	966	35.0
2010–2012	6970	38.7	1883	37.2	1046	37.9
Charlson-Deyo comorbidity score							<.0001
0	14,357	79.7	3623	71.5	2012	72.9
1	2934	16.3	1122	22.2	575	20.8
≥2	715	4.0	319	6.3	172	6.2
Location							<.0001
Northeast	2889	16.0	918	18.1	519	18.8
South	6602	36.7	1942	38.3	1063	38.5
Central	4732	26.3	1385	27.3	712	25.8
West	2465	13.7	819	16.2	465	16.9
Unknown	1318	7.3	0	0.0	0	0.0
Facility type							<.0001
Community cancer program	800	4.4	228	4.5	117	4.2
Comprehensive community cancer program	4202	23.3	1491	29.4	852	30.9
Academic or research program	10,582	58.8	2982	58.9	1583	57.4
Integrated network cancer program	1102	6.1	361	7.1	207	7.5
Other or unknown	1318	7.3	2	0.0	0	0.0
Distance from reporting facility							.004
≤50 miles	13,524	75.1	3763	74.3	2129	77.2
>50 miles	4210	23.4	1219	24.1	573	20.8
Unknown	272	1.5	82	1.6	57	2.1
Residence							.15
Metropolitan	14,060	78.1	3874	76.5	2173	78.8
Urban	2954	16.4	889	17.6	433	15.7
Rural	368	2.0	101	2.0	50	1.8
Unknown	624	3.5	200	3.9	103	3.7
Income							.004
<$35,000	5784	32.1	1550	30.6	798	28.9
≥$35,000	11,531	64.0	3328	65.7	1851	67.1
Unknown	691	3.8	186	3.7	110	4.0
Site							<.0001
Tongue	9260	51.4	1969	38.9	1063	38.5
Gum	1774	9.9	1016	20.1	724	26.2
Floor of mouth	4154	23.1	945	18.7	306	11.1
Palate	215	1.2	137	2.7	101	3.7
Other	2603	14.5	997	19.7	565	20.5