2.5. Statistical Analysis
All statistical analyses were performed in the sense of an intention-to-treat analysis using the R-GNU software environment (General Public License, R Foundation for Statistical Computing, Vienna, Austria). Statistical significance was set at the level of α < 0.05. Baseline data were analyzed using unpaired Students-Fully nonparametric variance type tests (ANOVA type statistics) from the nparLD (Nonparametric Longitudinal Data Analysis) package [