Fig. 4: Statistical analyses of the overall survival (OS) of our cohort and different groups in the literature.

A The Kaji group had significantly better OS than the non-Kaji group, our group, and the other East Asian and Western groups from the literature. B The Kaji and non-Kaji groups were combined to form the Japanese group, and the Western and Other East Asian groups in the literature were combined to form the non-Japanese group; the Japanese group had significantly better OS than the non-Japanese group and our study.