Table 1

Clinical data		Oral leukoplakia (n = 20)	Oral squamous cell carcinoma (n = 20)	P-value
Clinical data		N (%)	N (%)	P-value
Sex	Male	8 (40)	18 (90)	0.0022^a*
Sex	Female	12 (60)	2 (20)	0.0022^a*
Sites	Tongue	9 (45)	10 (43.48)	0.9202^b
Sites	Other	11 (55)	13 (56.52)	0.9202^b
Age	< 60	9 (45)	10 (50)	1.0^a
Age	> 60	11 (55)	10 (50)	1.0^a
Habits	Smoker	8 (40)	15 (75)	0.0536^a
Habits	No smoker	12 (60)	5 (25)	0.0536^a

^aFischer's exact test; ^bchi-squared test.
*Statistically significant at P < 0.05.
N = number.