Table 2.

 Intercorrelations among all study variables included in the logistic regression models

	1	2	3	4	5	6	Baseline b-ADL	6-months b-ADL	Baseline i-ADL	6-months i-ADL	11	12	13	14	15
1. Age	1
2. Sex	0.00	1
3. Education	− 0.14	0.14	1
4. Group	− 0.17*	− 0.03	0.14	1
5. Medication	0.17*	− 0.09	− 0.14	− 0.18*	1
6. Fried score	0.14	− 0.02	− 0.20*	− 0.13	0.38***	1
7. Baseline b-ADL	0.23**	− 0.06	− 0.11	− 0.06	0.34***	0.48***	1
8. 6-month b-ADL	0.25**	0.01	− 0.06	− 0.13	0.29**	0.41***	0.74***	1
9. Baseline i-ADL	0.29**	− 0.01	− 0.15	− 0.29**	0.19*	0.31***	0.46***	0.47***	1
10. 6-month i-ADL	.39***	0.10	− 0.16	− 0.29**	0.24**	0.37****	0.46***	0.55***	0.72***	1
11. Stroop Errors	0.17	0.01	− 0.14	− 0.18*	0.26**	0.39***	0.31***	0.40***	0.35***	0.52***	1
12. Lexical fluency	− 0.28**	0.01	0.26**	0.31***	− 0.27**	− 0.32***	− 0.28**	− 0.29**	− 0.34***	− 0.47***	− 0.44***	1
13. Semantic fluency	− 0.35***	− 0.05	0.23**	0.23**	− 0.06	− 0.23**	− 0.29**	− 0.30***	− 0.43***	− 0.55***	− 0.35***	0.45***	1
14. TMT-B time	0.17*	0.04	− 0.11	− 0.18*	0.19*	0.16	0.24**	0.15	0.41***	0.43***	0.37***	− 0.35***	− 0.35***	1
15. Zoo profile	− 0.11	0.11	0.17*	0.21*	− 0.07	− 0.10	− 0.25**	− 0.25**	− 0.29**	− 0.27**	− 0.32***	0.16	0.16	− 0.21*	1
16. 2-Back score	− 0.20*	0.04	0.20*	0.16	− 0.15	− 0.21*	− 0.42***	− 0.23**	− 0.44***	− 0.41***	− 0.41***	0.35***	0.39***	− 0.41***	0.34***

*p < .05; ** p < .010; ***p < .001; sex (0 = women; 1 = men); education (0 = secondary school or lower; 1 = higher than secondary school); group (1 = non-degenerative disorder; 2 = degenerative disorder; 3 = no disorder); ADL = activities of daily living; TMT = Trail-Making Test. The values in bold indicate significant coefficients