Table 3.

Association of oral cavity cancer with smokeless tobacco (SLT) use in study subjects.

Variables	Cases(n = 90)	Controls(n = 120)	Unadjusted OR	95% CI	Adjusted ORa	95% CIa	Adjusted ORb	95% CIb
SLT users	58	32	4.98	2.76–9.01	4.71	2.53–8.74	28.29	9.93–80.52
Never user	32	88	1.00 (referent)	-	1.00 (referent)	-	1.00 (referent)
Type of SLT used:
Snuff	36	20	4.95	2.51–9.77	4.82	2.37–9.80	32.65	10.6–100.4
Betel leaf	16	8	5.50	2.15–14.08	4.42	1.66–11.91	23.18	6.23–86.2
Supari/chalia	6	4	4.12	1.09–15.57	4.67	1.14–19.12	21.09	3.59–123.6
Never users	32	88	1.00 (referent)	-	1.00 (referent)	-	1.00 (referent)	-
Duration of snuff use:
<10 years	10	5	3.70	1.20–11.4	5.45	1.59–18.71	21.44	4.89–94.01
10–20 years	4	6	1.23	0.33–4.56	1.73	0.43–6.99	5.81	1.23–27.45
>20 years	22	9	4.52	1.95–10.52	3.25	1.37–7.71	6.45	2.50–16.65
Never users	54	100	1.00 (referent)	-	1.00 (referent)	-	1.00 (referent)	-
Frequency of snuff use:
Daily			5.22	2.66–10.27	5.22	2.56–10.65	34.5	11.2–106.1
Frequently in a week			6.60	2.16–20.2	6.80	2.09–22.1	45.8	9.74–216.1
Weekly			5.50	0.961–31.5	4.82	0.76–30.4	32.4	3.64–287.8
Frequently in a month			2.20	0.56–8.71	1.43	0.35–5.83	5.48	0.97–31.03
No			1.00 (referent)	-	1.00 (referent)	-	1.00 (referent)	-

a: OR adjusted for age (≤50 and >50 years) and smoking (never vs. ever smokers). b: OR adjusted for age (≤50 and >50 years), gender, and smoking (never vs. ever smokers).