Table 2.

Odds ratios (OR) of salivary gland cancer associated with some demographic and lifestyle factors.

Variables	Cases	Controls	Adjusted∗
			OR	95% CI	p trend
Family income adequacy
Low income	14	454	Ref		0.29
Lower middle income	21	482	1.17	0.69–1.98
Upper middle income	35	748	1.19	0.76–1.86
High income	28	545	1.28	0.79–2.08
Education (years)
0–8	30	558	Ref		0.12
9–12	48	1249	0.67	0.41–1.07
>12	52	1258	0.65	0.40–1.06
Smoking status
Never smoked	51	1164	Ref		0.87
Ex-smoker	51	1254	0.96	0.63–1.47
Current smoker	30	658	0.97	0.60–1.54
Smoking pack years
0 (never smoked)	51	1164	Ref		0.54
1–<20	36	880	0.91	0.59–1.42
20–<40	21	558	0.88	0.52–1.49
≥40	23	443	1.35	0.78–2.33
Body mass index (kg/m2)
18.5–<25.0	58	1406	Ref		0.17
25.0–<30.0	47	1173	0.97	0.65–1.45
≥30.0	26	409	1.52	0.94–2.45
Moderate and strenuous recreational physical activity (sessions/month)
<8	50	1015	Ref		0.29
8–30	46	1093	0.85	0.56–1.29
>30	36	968	0.78	0.50–1.23
Total energy intake (kcalories/week)
<10747	36	1022	Ref		0.47
10747–<14429	52	1028	1.44	0.93–2.23
≥14429	44	1022	1.19	0.76–1.88
Alcohol consumption (drinks/week)
0	43	1124	Ref		0.23
1–7	52	1287	0.99	0.65–1.50
>7	37	663	1.37	0.85–2.20
Coffee consumption (average cups/week)
0–7	56	1270	Ref		0.93
>7–17.5	49	1143	0.98	0.66–1.45
>17.5	27	600	0.98	0.61–1.58
Tea consumption (average cups/week)
0	31	729	Ref		0.30
1–7	56	1301	1.09	0.70–1.72
>7	43	943	1.29	0.79–1.20
Occupational exposure to radiation
No	120	2913	Ref
Yes	10	160	1.39	0.72–2.72
Chemical exposure∗∗
No	81	1934	Ref
Yes	51	1142	1.01	0.68–1.48

^∗Adjusted for age, sex, and province of residence.

^∗∗Worked at work or home with asbestos, arsenic salts, chromium salts, cadmium salts, asphalt, mineral oils, benzidine, benzene, isopropyl oil, dyestuffs, vinyl chloride, pesticides, herbicides, mustard gas, welding, and wood dust.