Table 3. Discrimination functions of the DFA model.

(Funct) DFA function. (Eigenval) eigenvalue, (Cum var, %) explained cumulative variance). (Wilks’ Lam) Wilks’ Lambda. (Sig) Significance. (**) p < 0.001.

Funct	Eigenval	Cum var (%)	Wilks’ Lam	Sig.	Mostly correlated variable
1	3.801	36.8	0.271	**	First quartile time (0.736)
2	2.364	59.7	0.091	**	Frequency 5% (0.846)
3	1.618	75.4	0.031	**	Call duration (0.693)
4	1.286	87.8	0.015	**	Third quartile frequency (0.798)
5	0.572	93.4	0.009	**	Bandwidth 90% (0.885)
6	0.449	97.7	0.006	**	Minimum Entropy (0.848)
7	0.234	100.0	0.004	**	First quartile frequency (0.442)