Chewing	Smoke	Alcohol	No. Cases/Controls	OR (95% CI)
No	No	No	50/1471	1
No	No	Yes	0/75	-
No	Yes	No	175/1084	3.54 (2.54–4.94)
No	Yes	Yes	199/449	8.41 (5.94–11.90)
Yes-T−	No	No	5/83	1.60 (0.61–4.17)
Yes-T−	No	Yes	0/15	-
Yes-T−	Yes	No	10/49	4.89 (2.29–10.43)
Yes-T−	Yes	Yes	19/34	10.75 (5.53–20.90)
Yes-T+	No	No	25/127	3.73 (2.20–6.31)
Yes-T+	No	Yes	7/26	4.28 (1.72–10.62)
Yes-T+	Yes	No	32/102	4.55 (2.74–7.56)
Yes-T+	Yes	Yes	114/119	13.44 (8.90–20.29)