Table 2.

Multivariate Cox survival analysis results for patients with ALS.

Variable	β-Value	SE	Wald	p-Value	HR (95% CI)
Age of onset (year)
≤ 55					1.000
> 55	0.549	0.156	12.374	<0.001	1.732 (1.275, 2.351)
Diagnostic delay (m)
> 12					1.000
≤ 12	0.474	0.173	7.498	0.006	1.606 (1.144, 2.255)
Median nerve NI
> 2.15					1.000
≤ 2.15	0.434	0.156	7.725	0.005	1.543 (1.136, 2.094)
ΔALSFRS-R
≤ 0.8					1.000
> 0.8	0.914	0.173	27.94	<0.001	2.495 (1.777, 3.501)

ALS, amyotrophic lateral sclerosis; ALSFRS-R, amyotrophic lateral sclerosis functional rating scale-revised; NI, neurophysiological index; HR, hazard ratio; CI, confidence interval.