Statistical analysis
Continuous variables were analyzed using the t-test and are presented as
means and standard deviations. Fisher’s exact test was used to compare
categorical variables. Time-to-event analysis was performed using
Kaplan–Meier curves, and the log-rank test was used to compare the
differences between the groups. For all analyses, p values were
two-sided, and statistical significance was set at p <0.05.
JMP version 13 (SAS Institute Inc., Cary, NC, USA) was used for all the
statistical analyses.