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.