Table 3:

Harmane and mercury concentrations by tremor diagnosis

	ET (all)	Definite ET	Probable ET	Possible ET	Control
N	26	3	12	11	196
Harmane	1.74 [2.32 ± 2.05] p = 0.92	4.13 [4.86 ± 3.86] p = 0.126	2.28 [2.35 ± 1.82] p = 0.91	1.27 [1.60 ± 1.18] p = 0.28	1.53 [2.51 ± 2.29]
Log Harmane	0.24 [0.21 ± 0.40] p = 0.92	0.62 [0.58 ± 0.40] p = 0.126	0.36 [0.23 ± 0.40] p = 0.91	0.10 [0.09 ± 0.37] p = 0.28	0.19 [0.25 ± 0.37]
Mercury	10.11 [17.30 ± 17.78] p = 0.86	11.41 [10.49 ± 8.22] p = 0.64	11.30 [21.31 ± 20.77] p = 0.51	8.40 [14.80 ± 16.19] p = 0.86	11.36 [16.18 ± 17.41]

ET = essential tremor.

Values are median [mean ± standard deviation].

Harmane was in g⁻¹⁰/ml and mercury was in ng/ml.

All statistical tests are Mann-Whitney test compared to controls.

For comparison of harmane concentration in definite and probable ET (n = 15) vs. 196 controls, p = 0.44 (Mann-Whitney test); for comparison of mercury concentration in definite and probable ET (n = 15) vs. 196 controls, p = 0.70 (Mann-Whitney test).