Statistics analysis
The Skewness test was used to assess the normality of quantitative variables. Descriptive statistics, independent sample t-test, and repeated measurements were utilized for to examine continuous quantitative variables. Meanwhile, Fisher’s exact and Chi-square tests were used to examine associations between variables. Repeated measurements were used to compare the mean score of VAS, VMS, PBLAC, and mefenamic acid consumption between the two groups over time. In addition, the Greenhouse-Geisser test was used in cases where the sphericity of the test was not assumed. SPSS version 16 was used for the data analysis, and the p < 0.05 was considered statistically significant.