Table 3.

Association between Betel Chewing and OSCC

		Cases		Controls		Odd ratio (95% CI)	p value
		N	%	N	%
Betel chewing	Betel only	9	8.57	13	6.19	3.13 (1.19-8.19)	p=0.016
	Betel leaf, slaked-lime and areca nut	22	20.95	34	16.19	2.92 (1.45-5.89)	p=0.002
	Betel leaf, slaked-lime, and tobacco	18	17.14	24	11.42	3.39 (1.58-7.25)	p=0.001
	Betel leaf, slaked-lime, areca nut and tobacco	33	31.42	35	16.66	4.26 (2.21-8.21)
	Never						p=0.000
		23		104		1
Consumption of betel quid per day	1 pack	30	36.58	47	45.63	2.96 (1.56-5.64)	p=0.001
	1-2 quid	30	36.58	37	35.92	3.77 (1.95-7.29)	p=0.000
	>2 quid	22	26.82	19	18.44	5.38 (2.51-11.53)	p=0.000
Overnight keeping the mixture in the mouth		46	43.80	41	19.50	3.21 (1.92-5.37)	p=0.000
Combined use of smoking and betel quid
Combined use of smoking and betel chewing		57	54.20	65	30.90	15.34 (5.27-44.67)	p=0.000
Not smoking and betel chewing		4	0.01	70	33.30	1