. Author manuscript; available in PMC: 2014 Dec 1.

Published in final edited form as: J Neurol. 2013 Oct 8;260(12):3115–3121. doi: 10.1007/s00415-013-7123-8

Table 2.

Degree of nerve enlargement in CMT-1, CIDP, GBS, and MMN

	Diagnosis
Nerve Characteristic	CMT-1 n=35	CIDP n=55	GBS n=21	MMN n=17
Average NSI > twice normal (n= (%))	28 (80%)	17 (31%)^*	1(5%)^*,^ŧ	0^*
Average NSI > three times normal (n= (%))	17 (49%)	7 (13%)^*	0^*	0^*
All four nerve sites > twice normal size (n= (%))	21 (60%)	8 (15%)^*	0^*	0^*
Average NSI (% mean (SD))	300 (111)	200 (123)^*	130 (38)^*, ^ŧ	120 (23)^*
Median Arm NSI (% mean (SD))	325 (154)	236 (147)^*	152 (51)^*, ^ŧ	135 (61)^*

p≤0.001 compared to CMT-1;

^ŧ

p≤0.02 compared to CIDP

A diffuse enlargement pattern was more common in CMT-1 than CIDP, GBS, or MMN.