Table 3.

Somatosensory evoked potentials’ parameters in CIDP patients and in the control group

SEPs		Study group n = 24 Mean ± SD	Control group n = 35 Mean ± SD	p value
Latency (ms)	N9	10.96 ± 1.82	9.76 ± 0.89	< 0.001
	P10	12.91 ± 2.11	11.31 ± 0.97	< 0.001
	N13	15.83 ± 2.14	13.16 ± 1.14	< 0.001
	P16	19.19 ± 2.38	16.25 ± 1.05	< 0.001
	N20	22.91 ± 2.76	19.26 ± 1.09	< 0.001
	P22	26.34 ± 3.71	22.26 ± 1.67	< 0.001
	N13–N9	4.87 ± 1.42	3.40 ± 0.78	< 0.001
	TT (N20–N13)	7.08 ± 2.17	6.10 ± 0.81	0.080
Amplitude (μV)	N9/P10	1.23 ± 0.87	2.84 ± 1.89	< 0.001
	N13/P16	0.86 ± 0.50	0.98 ± 0.37	0.351
	N20/P22	1.01 ± 0.74	0.95 ± 0.52	0.912

SEPs somotosensory evoked potential, TT transit time, uV microvolts, ms millisecond, SD standard deviation