Table 1.

Characteristics of patients with multifocal motor neuropathy (MMN), amyotrophic lateral sclerosis (ALS) and healthy controls

	MMN (n = 10)	ALS (n = 10)	Healthy controls (n = 10)
Mean age, years (range)	54 (29–67)	53 (40–60)	54 (29–67)
Male (%)	8 (80 %)	8 (80 %)	8 (80 %)
Median duration of symptoms in months (range)	52 (11–124)*	11 (6–34)*	–
Median duration of treatment in months (range)	12 (1–39)	4 (1–24)	–
Weakness lower arm (%)	15/20 (75 %)	15/20 (75 %)	–
Number of conduction blocks (%)	7 (18 %)	0 (0 %)	0 (0 %)
Number of nerves with distal compound muscle action potential < lower limit of normal (%)	6 (15 %)	8 (20 %)	0 (0 %)

*P < 0.001