Fig. 1

Kaplan-Meier analysis of RFS. a RFS in the DM (median 51.00 months, 95% CI 47.77–54.23) and non-DM groups (median not reach), log-rank P = 0.221. b RFS in the non-DM group (median not reach), proper glycemic control group (median not reach), and poor glycemic control group (median 36.00 months, 95% CI 17.36–54.64), pairwise comparisons: non-DM group vs. poor glycemic control group, log-rank P = 0.049; non-DM group vs. proper glycemic control group, log-rank P = 0.329; proper glycemic control group vs. poor glycemic control group, log-rank P = 0.019