Statistical analysis
Continuous variables are presented as medians and interquartile ranges
(IQR) and were compared with the Mann-Whitney U test and Kruskal-Wallis
H test (independent groups) or Wilcoxon signed rank test (paired
groups). Categorical variables are presented as numbers/percentages and
were compared with the χ2 test or Fisher’s exact test.
Results of logistic regression are reported as odds ratio (OR) and 95%
confidence interval (CI). The survival rate was estimated using the
Kaplan–Meier method. Five-year progression-free survival (PFS) and OS
were calculated from diagnosis to the date of last follow-up,
progression, or death. P-values <0.05 were considered
statistically significant. Statistical analyses were performed using
SPSS Statistics (v.24; IBM Corp.-USA) and RStudio (v.1.3.1093; RStudio,
PBC).
RESULTS