Tibco statistica 13.3 pl

Statistical analyses were performed using TIBCO STATISTICA 13.3 PL (StatSoft, Kraków, Poland). Pearson’s chi-square test was used to compare the differences in categorical variables between the subgroups of respondents. After excluding the normality with the Shapiro–Wilk test, the U-Mann Whitney (for two compared groups) or Kruskal–Wallis tests with Dunn’s post-hoc test and Bonferroni correction (for more than two compared groups) were used to analyze differences between groups in the year of the studies, perceived level of stress, and the level of knowledge about DS (expressed in linear scale) in subgroups of students. Logistic regression was performed to assess the impact of analyzed features (independent factors) on the of use any DS, DS for stress, anxiety, depression, or sleeping problems, DS other than for those indications, and the use of POM (dependent factors). A p-value < 0.05 was considered statistically significant.

To express experimental data on all figures, means ± standard deviations (SD) were used. Statistical analysis of the effects of the substances on the studied parameters was carried out with the analysis of variance (ANOVA). The equality of variances was checked by the Brown–Forsythe test and specific comparisons between studied groups were later performed with Tukey’s post hoc test. In the case of inequality of variance (creatinine, hematuria, and histological urinary bladder score), the Kruskal–Wallis test was used as a post hoc test. Hypotheses were positively verified if p < 0.05. Statistical analysis was performed using TIBCO STATISTICA 13.3 PL (StatSoft, Kraków, Poland). Figure 2, Figure 3 and Figure 4 and Figure 6, Figure 7 and Figure 8 were performed using GraphPad Prism version 8.0 (GraphPad Software, San Diego, CA, USA).