Table 1.

Characteristics of oral squamous cell carcinoma cases and controls, Seattle metropolitan area, 1985–1989 and 1990–1995.^a

Characteristic	Cases (n=400)		Controls (n=613)
	n	%	n	%
Age (years)
18–39	28	7.0	62	10.1
40–49	82	20.5	141	23.0
50–59	147	36.8	215	35.1
60–65	143	35.8	195	31.8
Sex
Men	286	71.5	439	71.6
Women	114	28.5	174	28.4
Race
White	375	93.8	578	94.3
Other	25	6.3	35	5.7
Income
<$15,000	91	23.2	35	5.8
$15,000 to <$30,000	100	25.5	124	20.6
$30,000 to <$45,000	98	25.0	154	25.6
≥$45,000	103	26.3	289	48.0
Education
High school or less	178	44.5	178	29.0
College or technical school	184	46.0	337	55.0
Graduate school	38	9.5	98	16.0
Pack-years of cigarette smoking
Never	60	15.0	217	35.4
>0 to <10	28	7.0	115	18.8
10 to <20	29	7.3	72	11.8
20 to <30	42	10.5	75	12.2
30 to <40	76	19.0	51	8.3
40 to <50	58	14.5	32	5.2
≥50	107	26.8	51	8.3
Number of alcoholic drinks per week
Never	16	4.0	45	7.3
>0 to <7	128	32.0	362	59.1
7 to <14	67	16.8	96	15.7
14 to <28	76	19.0	68	11.1
≥28	113	28.3	42	6.9
HPV-16 Seropositivity
Positive	190	52.8	195	34.7
Negative	170	47.2	367	65.3

^aPercentages have been rounded and may not total 100.