Fig. 2.

Subgroup 1, without co-deletion or polysomy; Subgroup 2, with co-deletion but without polysomy; Subgroup 3, with polysomy but without co-deletion; Subgroup 4, with polysomy and co-deletion. The survival time of subgroup 1 and 4 was significantly shorter compared with subgroup 2 (P = 0.001 for PFS, P = 0.015 for OS, respectively) but longer than subgroup 3 (P = 0.001 for PFS, P = 0.05 for OS, respectively). No significant difference of prognosis was observed between subgroup 1 and 4 (P = 0.803 for PFS, P = 0.868 for OS, respectively)