Table 1.

Descriptive statistics for the main variables examined in the study.

Variable	M	SD	Min.	Max.	Skew.	Kurt.
Cognitive functioning (MMSE)	26.77	1.45	24.00	29.00	−0.12	−0.90
Cognitive impairment (CDR-SB) – pre-test	1.73	0.97	0.50	4.50	0.74	0.05
Cognitive impairment (CDR-SB) – post-test	3.59	2.96	0.50	17.00	2.59	8.19
Cognitive impairment progression (ΔCDR-SB)	1.86	2.63	0.00	13.50	2.95	9.56
Cumulative illness – CIRS overall score	19.88	2.51	16.00	26.00	0.54	−0.48
Intellectual activity	2.86	1.74	1.00	6.00	0.57	−0.99
Physical activity	5.68	2.83	1.00	9.00	−0.24	−1.36
Social activity	5.37	3.57	1.00	11.00	0.19	−1.32

M, mean; SD, standard deviation.