Figure 4. Overall survival and time to recurrence are shown for patients with low MMP-9 expression (A) and high MMP-9 expression (B). Kaplan-Meier survival estimates and log-rank tests were used to assess the association between HOXC6 expression and overall survival or time to recurrence in patients with low MMP-9 expression (n = 79) or high MMP-9 (n = 85).