Statistical analysis
Categorical variables are reported as numbers (percentages), and continuous variables are reported as mean ± standard deviation (SD). Continuous variables were tested for normal distribution using histograms and Q-Q plots. Categorical variables were compared using chi-squared test or Fisher’s exact test and continuous variables - by Mann-Whitney test or t-test, as appropriate. Revision surgeries were excluded from surgery type and tumor size analysis. A two-tailed p<0.05 was considered statistically significant. Analyses were performed with SPSS version 22 (IBM Corporation, Armonk, NY).