Table 1. Distribution of 768 cases of oral and pharyngeal cancer and 2078 controls according to sex, age, education, and other selected variables. Italy and Switzerland, 1997–2009.

	Cases		Controls
Characteristic	N	%	N	%
Center
Italy	348	45.3	1001	48.2
Switzerland	420	54.7	1077	51.8
Sex
Men	593	77.2	1368	65.8
Women	175	22.8	710	34.2
Age (years)
<50	120	15.6	483	23.2
50–<60	311	40.5	607	29.2
60–<70	238	31.0	645	31.0
⩾70	99	12.9	343	16.5
Educationa (years)
<7	143	18.6	379	18.3
7–<12	278	36.2	641	31.0
⩾12	347	45.2	1048	50.7
Body mass index (kg m−2)
<20	98	12.8	107	5.2
20–<25	356	46.4	780	37.5
25–<30	248	32.3	944	45.4
⩾30	66	8.6	247	11.9
Smoking statusa
Never smoker	115	15.1	1031	49.7
Ex-smoker	134	17.6	478	23.0
Current smoker
<15 cigarettes per day	41	5.4	211	10.2
15–24 cigarettes per day	181	23.7	288	13.9
⩾25 cigarettes per day	292	38.3	67	3.2
Alcohol consumption (drinks per day)
<2	168	21.9	1464	70.5
2–<4	165	21.5	450	21.7
4–<8	205	26.7	141	6.8
⩾8	230	30.0	23	1.1

^aThe sum does not add up to the total because of some missing values.