Table 1.

Clinical and tumor characteristics

Variables	Surgery cohort (n = 7587)		Nonsurgery cohort (n = 5087)		Validation cohort (n = 191)
	No.	%	No.	%	No.	%
Agea (years)
18–44	985	13.0	209	4.1	51	26.7
45–54	1714	22.6	1126	22.1	43	22.5
55–64	2287	30.1	1952	38.4	44	23.0
65–74	1522	20.1	1175	23.1	35	18.3
75+	1079	14.2	625	12.3	18	9.5
Race
White	6499	85.7	4428	87.0	0	0
Black	416	5.4	469	9.2	0	0
Otherb	672	8.9	190	3.7	191	100
Sex
Female	2882	38.0	875	17.2	91	47.6
Male	4705	62.0	4212	82.8	100	52.4
Marital status
Unmarried	2245	29.6	1732	34.0	23	12.0
Married	5342	70.4	3355	66.0	168	88.0
Grade
I	1621	21.4	345	6.8	92	48.2
II	4047	53.3	2289	45.0	66	34.6
III	1877	24.7	2390	47.0	29	15.2
IV	42	0.6	63	1.2	4	2.1
T stage
T1	3905	51.5	907	17.8	104	54.5
T2	2389	31.5	2142	42.1	59	30.9
T3	706	9.2	860	16.9	11	5.8
T4a	557	7.3	1035	20.4	12	6.3
T4b	30	0.5	143	2.8	5	2.5
N stage
N0	4528	59.6	957	18.8	158	82.7
N1	1228	16.2	1090	21.4	18	9.4
N2a	257	3.4	380	7.5	4	2.1
N2b	1152	15.2	1266	24.9	6	3.2
N2c	331	4.4	1128	22.2	3	1.6
N3	91	1.2	266	5.2	2	1.0
M stage
M0	7527	99.2	4888	96.1	186	97.4
M1	60	0.8	199	3.9	5	2.6
Radiation
Yes	3606	47.5	4491	88.3	107	56.0
None	3981	52.5	596	11.7	84	44.0
Surgery performed
Yes	7587	100	0	0	191	100
None	0	0	5087	100	0	0

^aAge at diagnosis.

^bOther including American Indian/AK Native, Asian/Pacific Islander.