Table 1.

Participant characteristics.

	Controls	ALS
No.	30	29
Age, year, mean ± SD (range)	59.3 ± 9.9 (29–79)	59.5 ± 10.2 (32–78)
Male:female	20:10	17:12
Disease duration, month, mean ± SD (range)	NA	28.6 ± 14.5 (4–64)
UMN Score, mean ± SD (range)	NA	15.6 ± 7.0 (1–27)
ALSFRS-R Score, mean ± SD (range)	NA	34.1 ± 8.2 (18–47)

ALS, amyotrophic lateral sclerosis; ALSFRS-R, revised Amyotrophic Lateral Sclerosis Functional Rating Scale, UMN, upper motor neuron.