*4.3. Predicting the Phase Change*

We applied multinomial logistic regression model from NNet package [54] to predict phase change (F1–F4) depending in which group a given person belonged to (C1, C2, or Ex), the time of measurement (T0, T4, T5), and the interaction of the group and the time of measurement. As a reference point, we took a null model with an intercept only and without any predictors entered. We performed null, group, time of measurement, and the interaction of group × time of measurement models, and we compared them against each other using AIC and ANOVA tests (Table 2).


**Table 2.** Model comparisons.
