Table 3. Risk of oral cancer associated with the lifestyle risk factors among both sexes (84 cases, 174 controls) in Khyber Pakhtunkhwa, Pakistan, derived from conditional logistic regression (conditioned on age and sex).

Risk Factors	Casesn (%)	Controls n (%)	OR1 (95% CI)	OR2 (95% CI)
Socio-Economic Status
Low	39 (46.4)	66 (37.9)	1.0	1.0
Medium	41 (48.8)	94 (54.1)	0.7 (0.4–1.2)	0.7 (0.4–1.3)
High	4 (4.8)	14 (8.0)	0.5 (0.1–1.5)	0.5 (0.1–1.7)
Smoking
Never	56 (66.6)	147 (84.4)	1.0	1.0
Ever	28 (33.3)	27 (15.5)	3.0 (1.5–5.8)	2.2 (1.4–4.9)
Alcohol
Never	80 (95.2)	171 (98.2)	1.0	1.0
Ever	4 (4.7)	3 (1.8)	2.7 (0.6–12.1)	0.7 (0.1–4.1)
Naswar
Never	17 (20.2)	126 (72.4)	1.0	1.0
Ever	67 (79.7)	48 (27.5)	22.9 (9.2–57.4)	21.2 (8.4–53.8)
Current	46 (54.7)	28 (16.1)	28.0 (10.5–74.0)	27.4 (10.0–74.7)
Past	21 (25.0)	20 (11.4)	16.4 (5.8–46.7)	14.3 (4.9–41.2)
Naswar Pack Years
0	17 (20.2)	126 (72.4)	1.0	1.0
1–10	16 (19.0)	16 (9.1)	15.3 (5.2–44.9)	12.5 (4.1–38.0)
11–20	27 (32.1)	15 (8.6)	28.7 (9.9–82.8)	26.5 (9.0–78.2)
>20	24 (28.5)	17 (9.7)	28.3 (9.3–86.2)	28.9 (9.3–90.2)
Naswar dip duration (minutes)
0	17 (20.2)	126 (72.4)	1.0	1.0
1–5	19 (22.6)	39 (22.2)	8.5 (3.1–23.3)	7.2 (2.5–20.4)
6–10	23 (27.3)	6 (3.4)	67.6 (18.6–245.6)	61.8 (16.6–229.5)
>10	25 (29.7)	3 (1.8)	142.2 (31.1–650.5)	136.2 (29.1–638.2)
Naswar Saliva *
Swallow	20 (29.8)	8 (20.8)	1.0	1.0
Spit	47 (70.1)	40 (79.1)	0.4 (0.1–1.3)	0.4 (0.1–1.4)
Naswar Type
Non-user	17 (20.2)	126 (72.4)	1.0	1.0
Black	50 (59.5)	37 (21.2)	22.2 (8.6–56.7)	21.3 (8.2–55.4)
Green	17 (20.2)	11 (6.3)	25.9 (8.0–83.0)	21.0 (6.4–68.9)

* _{Ever users only;}

_OR¹_{: Basic model conditioned for age and sex;}

_OR²_{: Basic model adjusted for other MAS variables.}