Table 1.

Descriptive statistics. Latency and amplitude of SEPs parameters in controls and in the various patients groups

	controls N = 10		Demented N = 14		mild dementia N = 4		severe dementia N = 10		Subcortical N = 3		Cortical N = 3		both cortical and subcortical N = 8
	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
N13 Latency	12.96	0.27	13.87	1.25	13.08	0.73	14.19	1.30	13.47	0.59	13.17	0.86	14.29	1.45
N13 Amplitude	2.56	0.32	2.09	0.91	2.75	0.44	1.83	0.92	2.68	0.57	2.50	0.46	1.72	0.99
N19 Latency	18.19	0.48	20.19	1.91	18.33	0.61	20.94	1.72	19.93	1.50	18.40	0.72	20.96	1.97
N19 Amplitude	2.27	0.22	1.16	0.97	1.86	0.98	0.88	0.86	1.73	1.32	0.95	1.01	1.03	0.88
N13-19 Latency	5.23	0.36	6.29	0.93	5.25	0.17	6.70	0.75	6.47	0.92	5.23	0.15	6.61	0.86
P27 Latency	27.28	0.29	30.59	2.64	28.40	1.91	31.46	2.43	31.47	3.65	27.43	0.49	31.44	1.91
P27 Amplitude	1.78	0.14	0.96	0.77	1.02	0.91	0.94	0.77	1.30	0.87	1.33	0.98	0.70	0.66
N11-P27 Latency	16.66	0.45	19.91	2.74	17.88	1.97	20.73	2.64	20.73	4.05	17.10	0.46	20.66	2.21