Univariate Cox proportional hazards regressions identified S‐NFL, CSF‐NFL, S‐pNFH, CSF‐pNFH, ALSFRS‐r score, DPR, UMN score and cMAP amplitudes as predictors of the mortality hazard ratio in ALS patients among all the tested factors (Table S5). Here, NEFL is linked to amyotrophic lateral sclerosis.