Table 1.

Parameters recorded using SFN electrode and CN electrode in the EDC muscle of ALS patients and healthy controls

Parameters	Healthy controls (n = 27)	ALS (n = 23)
SFN-jitter (μs)	30.0 ± 9.0	57.8 ± 18.5*
CN-jitter (μs)	27.4 ± 3.3	47.3 ± 17.0*
Fiber density (n)	1.2 ± 0.3	2.6 ± 0.5*
Spike number (n)	1.7 ± 0.3	2.5 ± 0.5*

Data are shown as mean ± SD. *A significant difference in the parameter between ALS patients and healthy controls (P<0.001). SFN: Single-fiber needle; CN: Concentric needle; EDC: Extensor digitorum communis; ALS: Amyotrophic lateral sclerosis; SD: Standard deviation.