Statistical Analysis
The D’Agostino-Pearson test was used to evaluate the normality of data. Normally distributed binary data groups were compared using the independent t-test. Comparison of COX-2 with prognostic factors and the correlation of variables between groups were analyzed by Spearman’s rank correlation test and the chi-square test. The test was considered significant when bipolar p-values were <0.05. The statistical analyses were carried out with the Medcalc software (Medcalc ver 16. Ostend, Belgium). Atatruk University School of Medicine local ethics committee approved this retrospective study.