TABLE 5.

Association between CSF metal/metalloid levels and ALSFRS-R scores.

Metal/metalloid	Correlation coefficients	P-value
Cu	0.05	0.77
Ni	–0.02	0.91
Hg	–0.13	0.56
As	0.04	0.83
Mn	0.30	0.20
Fe	0.03	0.87