Table 2. Demographic profile of participants.

Group	No.	Age [years]	Sex [male]	Handedness [right]	Education [years]	limb -bulbar onset	ALSFRS-R	Disease duration [months]
HC	38	59.5 ± 10.2	26	38	11.1 ± 1.0	n.a.	n.a.	n.a.
ALS	64	58.9 ± 11.5	39	59	10.6 ± 1.1	46−18	38.9 ± 5.7	20.4 ± 15.0
p	—	0.77	0.45	0.08	0.06	—	—	—