Table 2. Comparison of CEP and sub-scores according to age groups among 1991-and 2008-samples separately.

Neuropsychological testing, M (SD)	1991-ample		p*	p†	2008-sample		p*	p†
	Old	Young			Old	Young
	N = 57	N = 147			N = 39	N = 138
MMSE	27.0 (2.2)	29.0 (1.0)	<0.0001	<0.0001	28.5 (1.5)	29.1 (1.0)	0.01	0.03
CEP global score	63.5 (12.9)	77.3 (8.5)	<0.0001	<0.0001	78.4 (5.0)	84.6 (5.18)	<0.0001	<0.0001
Naming	11.8 (0.9)	12.0 (0)	0.009	0.06	11.9 (0.5)	11.9 (0.2)	0.29	0.33
Categorization	11.1 (0.9)	11.9 (0.4)	<0.0001	<0.0001	12.0 (0)	12.0 (0.1)	0.42	0.53
Cued recall	9.85 (3.26)	11.7 (0.7)	<0.0001	<0.0001	11.8 (0.5)	11.9 (0.4)	0.71	0.98
Immediate free recall (IFR)	7.34 (1.88)	9.26 (1.54)	<0.0001	<0.0001	9.67 (1.34)	10.59 (1.28)	0.0001	0.0004
Delayed free recall	6.63 (2.38)	8.85 (1.69)	<0.0001	<0.0001	9.23 (1.33)	10.29 (1.28)	<0.0001	<0.0001
IFR / Semantic encoding	6.56 (2.33)	9.03 (1.6)	<0.0001	<0.0001	8.67 (1.30)	9.42 (1.25)	0.002	0.004
Logical memory 1	5.07 (2.01)	6.44 (2.00)	<0.0001	0.003	6.10 (1.67)	7.31 (1.62)	<0.0001	0.0005
Logical memory 2	7.23 (2.20)	8.94 (1.92)	<0.0001	0.0004	9.13 (1.42)	9.94 (1.26)	0.0006	0.007
Visuo-spatial memory	5.29 (2.18)	7.26 (2.10)	<0.0001	<0.0001	7.85 (1.80)	9.17 (1.81)	<0.0001	0.0008
Visuo-spatial recognition	5.71 (3.21)	8.87 (2.57)	<0.0001	<0.0001	7.23 (2.86)	10.19 (2.17)	<0.0001	<0.0001

^*T-test;

^†T-tests stratified on gender and educational level; Mean (Standard Deviation); MMSE, Mini-Mental State Examination; CEP, Cognitive Efficiency Profile.