Table 6.

Correlation between MMP-2 and MMP-9 expression and cervical lymph node metastasis

Protein expression	Lymph node metastasis		P-value
	Positive	Negative
MMP-2			0.0022
High expression	14	11
Low expression	1	14
MMP-9			0.0072
High expression	13	10
Low expression	2	15