Table 1.

Demographics and subclassification of study groups

Category	Control	Premalignant lesion
		Leukoplakia	OSMF	OSCC
Subjects (n)	100	50	50	100
Age range (years)	21-65	21-90	21-70	21-90
Sex: Male	65	29	42	68
Female	35	21	8	32
Habits:
Tobacco chewing	-	28	42	34
Smoking	-	7	-	14
Smoking and chewing	-	14	8	38
Smoking and alcohol	-	1	-	9
Alcohol only	-	-	-	5
Site of Lesion
Buccal mucosa	-	21	31	64
Vestibule	-	-	4	-
Buccal mucosa and Vestibule	-	20	15	-
Alveolar mucosa	-	3	-	11
Palate	-	2	-	4
Tongue	-	4	-	19
Lip	-	-	-	2