Table 1. Selected characteristics of OSCC patients by sample type and controls, University of Washington Affiliated Medical Centers, 2003–2010.

	OSCC				Control
	Tumor sample		Uninvolved oral sample		Normal oral sample
	(n = 167*)		(n = 58)		(n = 45)
Characteristic	n	%	n	%	n	%
Age
19–39	7	4.2	4	6.9	17	37.8
40–49	26	15.6	10	17.3	14	31.1
50–59	57	34.1	18	31.0	5	11.1
60–90	77	46.1	26	44.8	9	20.0
Gender
Male	120	71.9	41	70.7	32	71.1
Female	47	28.1	17	29.3	13	28.9
Race
White	152	91.0	54	93.1	31	68.9
Non-white	15	9.0	4	6.9	14	31.1
Smoking status
Never/Former	86	51.5	37	63.8	33	73.3
Current	81	48.5	21	36.2	12	26.7
Drinking status
Never/Former	55	33.5	23	39.7	11	25.0
Current	109	66.5	35	60.3	33	75.0
Unknown	3				1
AJCC staging
I	39	23.3	15	26.3
II	16	9.6	9	15.8
III	22	13.2	8	14.0
IV	90	53.9	25	43.9
Unknown			1

^*49 of 167 OSCC patients provided both tumor tissue and uninvolved oral tissue.