Chewing	Smoke	Alcohol	No. Cases/Controls	OR (95% CI)
No	No	No	122/1471	1
No	No	Yes	16/75	2.56 (1.42–4.64)
No	Yes	No	268/1084	2.45 (1.94–3.10)
No	Yes	Yes	287/449	4.81 (3.74–6.19)
Yes-T−	No	No	24/83	3.39 (2.04–5.06)
Yes-T−	No	Yes	6/15	4.36 (1.55–12.30)
Yes-T−	Yes	No	25/49	4.80 (2.79–8.27)
Yes-T−	Yes	Yes	33/34	8.10 (4.68–14.02)
Yes-T+	No	No	159/127	9.27 (6.79–12.66)
Yes-T+	No	Yes	95/26	24.28 (14.87–39.65)
Yes-T+	Yes	No	161/102	8.53 (6.13–11.89)
Yes-T+	Yes	Yes	342/119	16.34 (12.13–22.00)