Table 1.

Baseline characteristics of the patients with essential tremor

Characteristics	Patients with ET (n = 12)	Stereotactic surgery		p value
		Vim DBS (n = 6)	Vim thalamotomy (n = 6)
Clinical variables
Age at surgery (yr)	70.9 ± 4.7	70.2 ± 2.7	71.6 ± 6.3	0.608
Duration of disease (yr)	19.6 ± 13.4	21.7 ± 10.7	17.5 ± 16.4	0.614
Male	10 (83.3%)	4 (66.7%)	6 (100%)	0.145
Tremor scores*
Part A†	16.2 ± 6.2	15.7 ± 2.8	16.5 ± 5.9	0.828
Part B‡	24.9 ± 7.5	24.2 ± 7.9	25.7 ± 7.7	0.748
Part C§	17.8 ± 6.1	16.8 ± 7.3	18.7 ± 5.1	0.627
Axial scores	2.3 ± 2.2	2.2 ± 2.6	2.3 ± 2.1	0.905
Total scores	58.8 ± 18.4	56.7 ± 21.1	60.8 ± 6.9	0.714

Values shown are mean ± standard deviation.

^*tremor severity assessed according to the Clinical Rating Scale for Tremor,10

^†tremor localization/severity rating,

^‡specific motor tasks/function rating,

^§functional disabilities resulting from tremor.

ET: essential tremor, Vim: ventral intermediate thalamic nucleus, DBS: deep brain stimulation.