Table 2.

Electrophysiological Characteristics of Patients With GBS.

	Elderly N = 34	Adult N = 76	p value
Days from clinical onset to NCS, median (IQR)	7 (5-13)	7 (5-9.75)	0.38
Demyelinating subtype, n (%)	20 (58.8)	27 (35.5)	0.03
Axonal subtype, n (%)	11 (32.3)	43 (56.5)	0.05
Equivocal, n (%)	3 (8.8)	6 (7.8)	0.66
Cubital nerve dCMAP amplitude, median (IQR)	2.4 (1.2-4.8)	2.4 (0.6-5.5)	0.83
Median nerve dCMAP amplitude, median (IQR)	2.9 (2.0-5.6)	1.5 (0.3-5.6)	0.24
Tibial nerve dCMAP amplitude, median (IQR)	1.5 (0.1-3.2)	1.3 (0.1-3.4)	0.23
Peroneal nerve dCMAP amplitude, median (IQR)	2.0 (0.34-5.7)	1.5 (0.2-5.0)	0.39
Median SNAP amplitude(µV), median (IQR)	10.3 (0-17.9)	28 (15.9-40.6)	<0.001
Sural SNAP amplitude(µV), median (IQR)	8.2 (0.0-13.8)	19.5 (10.7-25.9)	<0.001

GBS: Guillain-Barré syndrome, NCS: Nerve conduction study, dCMAP: Distal compound muscle action potential, SNAP: Sensory nerve action potential.