Table 3.

The correlation between the disease stage and clinical parameters of patients with ALS.

	n	Spearman r	P-value
Clinical Disease Stage (2, 3, 4)
Serum NFL level	30	0.188	P = 0.320
Disease duration (months)	30	0.476	P = 0.008
ALSFRS-r	26	−0.810	P < 0.001
DPR	26	0.446	P = 0.022

ALS, amyotrophic lateral sclerosis; ALSFRS-r, amyotrophic lateral sclerosis functional rating scale revised; DPR, Disease progression rate; NFL, Neurofilament light chain.

Bold type indicates a significant difference.