Table 4.

Clinical, neurophysiological, and ultrasonographic data: upper limbs.

		No/minimal impairment	Moderate impairment	Severe impairment	p value
Median nerve
Motor CV (m/sec)	CIDP	39.6 ± 10.7	30.0 ± 14.9	29.5 ± 15.6	0.129
	MMN	48.9 ± 4.7	41.9 ± 13.9	40.5 ± 11.6	0.631
CMAP amplitude (mV)	CIDP	6.9 ± 3.3	3.2 ± 2.6a	2.2 ± 1.2	0.007
	MMN	6.7 ± 1.4	4.5 ± 3.3	3.3 ± 2.3	0.034
Sensory CV (m/sec)	CIDP	34.2 ± 23.3	31.1 ± 23.4	22.4 ± 22.2	0.509
	MMN	54.5 ± 4.4	55.8 ± 6.2	58.0 ± 8.1	0.738
SNAP amplitude (μV)	CIDP	15.7 ± 23.7	4.2 ± 4.8	2.5 ± 3.7	0.236
	MMN	15.9 ± 8.1	18.0 ± 7.3	18.1 ± 9.3	0.267
CSAmax (mm2)	CIDP	17.8 ± 2.9	20.4 ± 5.7	14.1 ± 2.2	0.163
	MMN	12.2 ± 1.5	20.3 ± 4.5	12.8 ± 2.3	0.129
Intranerve variability	CIDP	2.9 ± 2.2	2.8 ± 1.7	2.0 ± 0.7	0.462
	MMN	2.3 ± 0.6	2.7 ± 1.5	2.1 ± 1.2	0.263
Ulnar nerve
Motor CV (m/sec)	CIDP	43.0 ± 12.6	34.3 ± 9.5	29.8 ± 8.7	0.091
	MMN	50.7 ± 5.0	39.7 ± 6.5	36.7 ± 7.7	0.099
CMAP amplitude (mV)	CIDP	7.8 ± 2.9	4.6 ± 2.4a	3.8 ± 2.4	0.004
	MMN	5.6 ± 1.9	4.8 ± 2.2b	4.1 ± 3.8	0.045
Sensory CV (m/sec)	CIDP	44.6 ± 17.6	30.8 ± 18.8	26.8 ± 25.6	0.133
	MMN	47.6 ± 8.9	51.3 ± 7.6	51.6 ± 8.4	0.688
SNAP amplitude (μV)	CIDP	17.7 ± 10.9	5.5 ± 4.2	2.2 ± 2.5	0.031
	MMN	15.5 ± 3.6	14.2 ± 8.9	9.7 ± 9.9	0.256
CSAmax (mm2)	CIDP	10.9 ± 2.9	14.4 ± 4.3a	11.9 ± 2.0	0.038
	MMN	10.0 ± 2.9	15.2 ± 4.8	9.5 ± 1.5	0.362
Intranerve variability	CIDP	2.4 ± 0.7	3.6 ± 1.2a	2.9 ± 0.7	0.014
	MMN	2.1 ± 0.7	3.7 ± 1.7a	2.2 ± 0.6	0.043

Results are reported as average ± standard deviation.

CMAP: compound muscle action potential.

CSA: cross-sectional area.

CV: conduction velocity.

SNAP: sensory action potential.

INCAT (inflammatory neuropathy cause and treatment) upper limbs score: no/minimal impairment = 0-1; moderate impairment = 2; severe impairment = 3–5.

^aSignificant difference (p < 0.05) versus “no/minimal impairment.”

^bSignificant difference (p < 0.05) versus “severe impairment.”