2.5. Statistical Analyses
INTERACTION
For statistical analysis, the current version of the SPSS (IBM SPSS Statistics 29.0, Ehningen, Germany) was used. All results were presented as mean values with standard deviations (mean ± SD). A linear mixed model (LME) was used to identify the time (five and 16-time points) and treatment effects (omnivore and vegan). For the analysis, the time and the treatment were defined as fixed effects and the individuals were considered as random effects. In addition, the maximum likelihood of the method was set with an iteration of 1000. Interaction effects could not be carried out due to the study design. The significant difference was set at 