Table 5.

Comparison of N-benzoyl-DL-arginine-2-naphthylamide test expressions between healthy and diseased sites in smokers and nonsmokers using McNemar’s test

Group	BANA test	Healthy site, n (%)	Diseased site, n (%)	P
Smokers	Positive	10 (25.6)	28 (71.8)	<0.001* (S)
	Negative	29 (74.4)	11 (28.2)
Nonsmokers	Positive	19 (48.7)	24 (61.5)	0.30 (NS)
	Negative	20 (51.3)	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