FIGURE 2.

Kaplan–Meier estimates of the progression‐free survival (PFS) of non‐splenectomy patients (n = 3654, dash line) and splenectomy patients (n = 94, solid line). The median PFS in months were 16 and 18 months for the non‐splenectomy and splenectomy patients, respectively. No significant difference in PFS was observed with the log‐rank test (p = 0.477). *An additional 163 patients were excluded from the survival analysis with reference to Figure 1, since these patients had unknown follow‐up or survival data