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. Author manuscript; available in PMC: 2022 Jun 1.
Published in final edited form as: Cerebellum. 2021 Aug 3;21(3):425–431. doi: 10.1007/s12311-021-01309-9

Table 1.

Basic demographics and cerebellar oscillations for controls and essential tremor cases

Control Essential tremor p value
n 20 40
Age 67.1 ± 9.3 66.8 ± 14.8 0.940a
Female gender 50% (10) 40% (16) 0.461b
Family history of tremor* 0% (0) 55% (22) < 0.001b
Tremor onset age NA 44.4 ± 19.8
Tremor duration (y) NA 22.0 ± 15.4
Total tremor score 0.1 ± 0.2 Median = 0.0 20.2 ± 9.0 Median = 18.5 < 0.001c
Cerebellar oscillation index 6.8 ± 2.9 Median = 6.8 12.4 ± 6.6 Median = 10.3 < 0.001c
a

Independent t test

b

Chi-squared test

c

Mann–Whitney test

*

With liberal criteria

The median is reported if one or more of the variables are not normally distributed