Table 2 Mean z scores obtained in each age category.

	Age <50 years		Age 50–60 years		Age >60 years		p
	Mean	SD	Mean	SD	Mean	SD
WAIS‐R (z)
Verbal information	−0.4	1.8	0.3	1.2	−0.1	1.2	0.64
Digit span	−0.4	1	−0.1	1.1	−0.6	1	0.71
Similarities	−0.3	1.4	0.2	1.1	−0.3	1.1	0.99
Vocabulary	−1.1	1.2	0.2	0.9	−0.3	0.7	0.36
Block design	−0.8	1.1	−0.5	0.8	−0.7	1.6	0.83
Code	−0.9	1.1	−0.6	0.8	−1.6	1.3	0.094
Grober‐Buschke (z)
Immediate cued recall	0.4	0.4	−1.2	1.7	−1.1	2.3	0.090
Free recall (sum of the 3 recalls)	−1.3	1.6	−0.6	1.2	−1.3	1.3	0.98
Cued recall (sum of the 3 recalls)	0.9	1.1	0.8	1.4	0.8	1.1	0.88
Recognition	0	0.6	0.3	0.5	−1	2.8	0.23
Delayed free recall	−1.8	1.8	−0.7	1.8	−1.7	1.8	0.98
Delayed cued recall	1.6	1.6	0.8	1.9	1	1.2	0.46
PM38
Percentile	56	32.3	64.5	28	51.7	38.4	0.74
Rey's figure (z)
Copy	0.6	2.5	−0.5	5.4	−3.1	6.3	0.058
Memory	0	1.2	−1.4	1.1	−1.9	1.6	0.0015*
Wechsler memory scale (z)
Mental control	−1.8	0.2	−1.7	0.1	−2	0.5	0.20
Logical memory	−1.5	1	−1.2	0.4	−1.4	0.9	0.91
Digit span	0.1	1.4	−0.3	1.1	−0.4	1.5	0.45
Visual reproduction	−0.5	0.7	0.2	0.3	−0.5	0.8	0.74
Paired words	0.1	1.2	0	1.4	−1	1.6	0.11
TMT (z)	1.6	1.9	1.8	1.1	0.6	1.9	0.32
Time A	0.6	1.4	0	0.8	0.7	2.3	0.96
Errors A	0.6	1.7	−0.4	0	2.7	7.5	0.27
Time B	1.8	2.2	1.6	2.3	1.1	2.5	0.53
Errors B	1.4	2.2	1.5	2.8	1.8	4.2	0.83
Verbal fluency (z)
Semantic fluency	−1.6	0.6	−1.5	0.7	−2.3	0.9	0.021*
Letter fluency	−1.1	1.1	−0.7	1.3	−1.7	1.1	0.20
Wisconsin (z)
Completed criteria	−0.4	0.6	−0.3	0.5	−0.7	0.4	0.25
Percentage of errors	3.6	2.3	2.3	2.6	4.1	1.3	0.78
MADRS (mean value)	11.8	6.9	9.5	7.5	11.9	7.2	0.94

*p<0.05.