TABLE 4.

Distribution of CSF metal/metalloid levels (median, 25th, and 75th percentile) by sex for ALS cases.

Metal/metalloid (μg/L)	Female N = 16 Median (IQR)	Male N = 13 Median (IQR)	P-value
Cu	78.11 (67.27–169.2)	81.96 (70.25–90.40)	0.68
Ni	3.69 (3.04–6.52)	3.51 (3.10–5.52)	0.68
Hg	0.29 (0.09–0.44)	0.19 (0.09–0.32)	0.45
As	0.97 (0.64–1.52)	0.61 (0.57–0.70)	0.11
Mn	1.74 (0.54–2.88)	1.67 (0.99–3.62)	0.63
Fe	266.2 (161.7–311.1)	185.6 (157.1–246.9)	0.12