Table 3.

N200 ERP component parameters in the healthy controls, the whole MS group and the subgroups of non-fatigued (I), moderately fatigued (II) and severely fatigued (III) MS patients

	Controls (n = 40)	MS patients (n = 86)		Subgroup I (n = 29)		Subgroup II (n = 31)		Subgroup III (n = 26)
Lat.N200 Fz (ms)
Mean	209.5	223.8	p (MS-contr) = 0.003	218.8	p (I-contr) = 0.11	225.8	p (II-contr) = 0.013 p (I–II) = 0.33	227.1	p (III-contr) = 0.003 p (I–III) = 0.17 p (II–III) = 0.85
Median	205.0	220.5		220.0		218.0		225.5
SD	23.1	25.7		23.9		30.6		20.7
Lat. N200 Cz (ms)
Mean	207.9	222.3	p (MS-contr) = 0.004	217.1	p (I-contr) = 0.12	224.7	p (II-contr) = 0.012 p (I–II) = 0.31	225.3	p (III-contr) = 0.003 p (I–III) = 0.20 p (II–III) = 0.93
Median	204.0	219.0		218.0		217.0		224.0
SD	22.5	26.9		24.9		31.8		22.3
Lat. N200 Pz (ms)
Mean	208.6	222.1	p (MS-contr) = 0.008	217.9	p (I-contr) = 0.11	223.8	p (II-contr) = 0.023 p (I–II) = 0.43	224.8	p (III-contr) = 0.006 p (I–III) = 0.29 p (II–III) = 0.89
Median	205.0	220.0		221.0		217.0		224.5
SD	22.0	27.2		25.3		32.4		22.6
Ampl N200 Fz (µV)
Mean	4.27	4.89	p (MS-contr) = 0.29	4.64	p (I-contr) = 0.59	5.25	p (II-contr) = 0.23 p (I–II) = 0.49	4.74	p (III-contr) = 0.51 p (I–III) = 0.89 p (II–III) = 0.57
Median	3.80	5.20		4.10		5.40		5.20
SD	2.91	3.15		2.77		3.82		2.71
Ampl N200Cz (µV)
Mean	3.51	4.12	p (MS-contr) = 0.31	4.31	p (I-contr) = 0.29	4.0	p (II-contr) = 0.53 p (I–II) = 0.70	4.06	p (III-contr) = 0.49 p (I–III) = 0.76 p (II–III) = 0.94
Median	2.10	3.40		3.70		3.60		3.20
SD	3.09	3.13		3.03		3.33		3.13
Ampl N200 Pz (µV)
Mean	2.69	2.96	p (MS-contr) = 0.55	2.96	p (I-contr) = 0.67	2.79	p (II-contr) = 0.86 p (I–II) = 0.6	3.18	p (III-contr) = 0.46 p (I–III) = 0.74 p (II–III) = 0. 49
Median	1.80	2.40		2.20		2.60		2.40
SD	2.58	2.21		2.36		1.74		2.57

Bold values indicate p < 0.05 which are statistically significant