Table1.

Demographic and tumor characteristics by race/ethnicity among colon cancer patients in the MHS 1998-2007.

	Race/Ethnicity
	Non-Hispanic White		Non-Hispanic Black		Asian/Pacific Islander		Hispanic White
	(n=1,530)		(n=350)		(n=169)		(n=106)
Characteristic	n	%	n	%	n	%	n	%	p-valuea
Year of diagnosis									0.05
1998-2000	577	37.7	119	34.0	55	32.5	26	24.5
2001-2003	496	32.4	110	31.4	52	30.8	39	36.8
2004-2007	457	29.9	121	34.6	62	36.7	41	38.7
Age at diagnosis, years									<0.01
20-49	209	13.7	80	22.9	27	16.0	15	14.2
50-59	335	21.9	90	25.7	59	34.9	33	31.1
60-69	449	29.3	109	31.1	49	29.0	28	26.4
70+	537	35.1	71	20.3	34	20.1	30	28.3
Sex									<0.01
Men	923	60.3	215	61.4	45	26.6	72	67.9
Women	607	39.7	135	38.6	124	73.4	34	32.1
Marital status									0.51
Never married	45	2.9	17	4.9	2	1.2	5	4.7
Married	1163	76.0	264	75.4	134	79.3	77	72.6
Other	261	17.1	58	16.6	28	16.6	21	19.8
Unknown	61	4.0	11	3.1	5	3.0	3	2.8
Active duty status									<0.01
No	1413	92.4	306	87.4	163	96.4	98	92.5
Yes	117	7.6	44	12.6	6	3.6	8	7.5
Service branchb									<0.01
Army	506	33.1	180	51.4	60	35.5	43	40.6
Air Force	540	35.3	87	24.9	38	22.5	25	23.6
Navy/Marines	416	27.2	71	20.3	59	34.9	13	12.3
Other	22	1.4	4	1.1	7	4.1	1	0.9
Unknown	46	3.0	8	2.3	5	3.0	24	22.6
Benefit type									<0.01
Prime	694	45.4	178	50.9	99	58.6	49	46.2
Not prime	448	29.3	84	24.0	36	21.3	17	16.0
Unknown	388	25.4	88	25.1	36	21.3	40	37.7
Rankb									<0.01
Enlisted	696	45.5	228	65.1	102	60.4	56	52.8
Officer	336	22.0	23	6.6	15	8.9	6	5.7
Other	6	0.4	1	0.3	3	1.8	2	1.9
Unknown	492	32.2	98	28.0	49	29.0	42	39.6
Obese									<0.01
No	1163	76.0	230	65.7	142	84.0	85	80.2
Yes	367	24.0	120	34.3	27	16.0	21	19.8
Tumor stage									0.02
Stage I	501	32.7	92	26.3	45	26.6	29	27.4
Stage II	487	31.8	110	31.4	45	26.6	35	33.0
Stage III	542	35.4	148	42.3	79	46.7	42	39.6
Tumor grade									0.12
Well differentiated	267	17.5	46	13.1	28	16.6	13	12.3
Moderately differentiated	997	65.2	249	71.1	114	67.5	69	65.1
Poorly differentiated	197	12.9	39	11.1	25	14.8	16	15.1
Unknown	69	4.5	16	4.6	2	1.2	8	7.5
Subsite									0.01
Right	685	44.8	150	42.9	54	32.0	39	36.8
Transverse	114	7.5	31	8.9	10	5.9	6	5.7
Left	639	41.8	149	42.6	99	58.6	56	52.8
Overlapping/unknown	92	6.0	20	5.7	6	3.6	5	4.7
Number of lymph nodes examined									0.20
0-11	650	42.5	132	37.7	72	42.6	37	34.9
12+	880	57.5	218	62.3	97	57.4	69	65.1

^a2-sided p-value assessing the overall differences between race/ethnicity and demographic and tumor characteristics.

^bService branch or rank of active duty member or sponsor.