Statistical Analysis
Overall survival was calculated as time in months between diagnosis and
last follow-up or death. Patients were considered as lost to follow-up
when they had failed to attend scheduled appointments for more than one
year. Five-year overall survival rates were estimated using the
Kaplan-Meier method with differences assessed using the log-rank test.
Analyses were performed using SPSS version 25 (IBM, Somers, NY, USA). p
values less than 0.05 were considered statistically significant.