Table 1.

Subjects' characteristics. ALS-FRS-R – revised ALS functional rating scale.

	PLS	ALS	controls	p
male/female	31/36	47/38	40/42	Kruskal-Wallis: 0.60
age/years (mean ± std. dev.)	60 ± 10, range (38–81)	60 ± 10, range (35–76)	62 ± 14, range (20–82)	Kruskal-Wallis: 0.54
ALS-FRS-R (mean ± std. dev.)	38 ± 7, range (16–45)	40 ± 7, range (15–46)	–	t-test: 0.15
disease duration / years (mean ± std. dev.)	5 ± 3 range (3–21) median 3 years	1 ± 1 range (0–3) median 1 year	–	t-test: <0.0001