Statistical Analysis
Frequencies and percentages of qualitative variables were calculated, and arithmetic means and standard deviations of quantitative variables. Averages were compared using the Student’s test for independent samples, verifying the variables’ normality using the Shapiro-Wilk test. In the absence of normal distribution, the Mann-Whitney U test was used. The value of p < 0.05 was accepted to determine the significant differences in the statistical tests. Kaplan-Meier survival analysis was performed with the log-rank test to compare the survival distributions of the samples. The analysis was performed using SPSS Statistics 24.