Table 6.

Comparison of N-benzoyl-DL-arginine-2-naphthylamide test expressions at healthy and diseased sites between smokers and nonsmokers using Chi-square test

Sites	BANA test	Smokers, n (%)	Nonsmokers, n (%)	P
Healthy sites	Positive	10 (25.6)	19 (48.7)	0.04* (S)
	Negative	29 (74.4)	20 (51.3)
Diseased sites	Positive	28 (71.8)	24 (61.5)	0.34 (NS)
	Negative	11 (28.2)	15 (38.5)

*Statistically significant. S – Statistically significant (P<0.001); NS – Statistically nonsignificant (P>0.001); n – Sample size; BANA – N-benzoyl-DL-arginine-2-naphthylamide; P – Level of Significance