Table 2.

The Factors Related to Development of Malignancy of OPMDs(n = 148)¹

	Malignant Transformation
	Yes		No
	N	%	N	%	P value
Age
<=45 years	13	20.00	52	80.00
> 45 years	9	11.39	70	88.61	0.1531
Smoking
No	18	13.64	114	86.36	0.0447
Yes	4	36.36	7	63.64
Alcohol use
No	13	14.13	79	85.87	0.7273
Yes	8	16.33	41	83.67
Areca quid use
No	20	14.49	118	85.51	0.1204
Yes	2	40.00	3	60.00
Location
Buccal2	8	8.25	89	91.75	< 0.0001
Tongue	11	52.38	10	47.62
Other3	3	11.54	23	88.46

¹: OSF cases are excluded in this table

²: Including buccal, vestibule and retromolar

³: Including lip, gingiva, palate