Table 2. Descriptive statistics of neuropsychological tests.

	MMSE raw	WMS Imm tot	WMS Delay tot	Stroop C W	MWSC	VFtot	SFtot	Digit Span F	Digit Span B
N	121	121	121	121	121	121	121	121	121
Mean	29.10	25.20	22.40	36.20	4.99	35.09	49.50	4.66	3.49
Median	30	23.0	19.0	37	6	36	48.0	5	3
Standard deviation	1.59	13.30	16.10	14.10	1.68	12.10	14.9	1.59	1.18
Skewness	−2.00	0.52	0.70	−0.20	−1.65	−0.18	1.98	−0.8	0.06
Std. error Skewness	0.22	0.22	0.22	0.22	0.22	0.22	0.22	0.22	0.22
Kurtosis	3.24	−0.98	−0.12	0.16	1.54	−0.42	11.6	−0.52	−1.27
Std. error Kurtosis	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44	0.44

Note:

MMSE raw, raw score of mini mental state examination; WMS imm tot and delay tot, Wechsler memory scale immediately and delay; Stroop C W, stroop colow word test; MWSC, modified Wisconsin sorting card; VF tot, verbal fluency total score; SF tot, semantic fluency total score; Digit Span F and B, digit span forward and backward.