Figure 2

Kaplan–Meier survival curves of rejection episode by surgical procedure groups (N = 730). The PK group has the highest hazard estimate of rejection, with significant differences between this group and the other three groups (P = 0.018 for DSAEK, P = 0.022 for nDSAEK, and P < 0.001 for DMEK). No significant difference was observed between DSAEK and nDSAEK (HR = 0.92, 95% CI [0.44, 1.95], P = 0.829). The DMEK group has the lowest hazard estimate of rejection, with significant differences between this group and the other three groups (P < 0.001, PK; P = 0.006, DSAEK; and P = 0.010, nDSAEK). DMEK descemet membrane endothelial keratoplasty, DSAEK descemet’s stripping automated endothelial keratoplasty, nDSAEK non-descemet’s stripping automated endothelial keratoplasty, PK penetrating keratoplasty.