Statistical analyses
The evaluation of the results was made using the SPSS Version.22.0
program. Variables in the study were evaluated in terms of normal
distribution using the One-Sample Kolmogorov-Smirnov test. Data which
are in compliance with the normal distribution were given with
arithmetic mean and standard deviations, and data which are not in
compliance with the normal distribution were given with median values
(25% -75% percent). Chi-square and Fisher tests were used for
comparison of categorical data. Non-parametric Mann Whitney test was
used to evaluate ordinal data. Kaplan-Meier method and Log-rank test
were used to calculate progression-free survival and overall survival
times. Progression-free survival time was accepted as the time from
diagnosis to progression, and total survival time from the date of
diagnosis to the date of patient death or the termination of follow-up
period. P<0.05 values were considered statistically
significant.