fig6

Figure 6. Kaplan–Meier curves of survival comparing patients at different stages of the disease. (A) There are no statistically significant differences in survival between stages I and II or between III and IV (Log-Rank test, P = 0.179 and P = 0.113, respectively). (B) Kaplan–Meier curves of survival comparing patients at early stages (I + II) with late stages (III + IV), which are significantly different (Log-Rank test, P < 0.0001).