Table IV.

N-status depending on HPV infection status and SLPI expression level.

	N-status
	0	1–3	Total
HPV-negative and SLPI−/+	4	15	19
HPV-negative and SLPI ++/+++	12	5	17
HPV-positive and SLPI −/+	3	13	16
HPV-positive and SLPI ++/+++	0	2	2
Total	19	35	54

The correlation is statistically significant (P=0.003). SLPI, secretory leukocyte protease inhibitor.