Table 2.

Side-specific efficacy of unilateral Vim thalamotomy and Vim DBS on tremor in patients with essential tremor

Tremor subscores*	Baseline (n = 12)	Postoperative state		p value
		3 months (n = 9)	6 months (n = 10)	3 months vs. baseline	6 months vs. baseline
Contralateral scores
Part A†	7.7 ± 2.5	1.6 ± 1.1	2.4 ± 1.9	0.008	0.004
Part B‡	11.4 ± 3.2	3.1 ± 2.0	4.0 ± 3.2	0.008	0.004
Ipsilateral scores
Part A†	6.2 ± 2.9	6.3 ± 2.8	5.9 ± 2.1	> 0.999	0.531
Part B‡	10.2 ± 4.5	9.6 ± 3.9	10.3 ± 3.4	0.688	0.688
Axial scores	2.3 ± 2.2	1.1 ± 0.8	1.0 ± 1.6	0.066	0.017
Part C§	17.8 ± 6.1	4.0 ± 3.7	6.3 ± 5.6	0.008	0.004
Total scores	58.8 ± 8.4	26.6 ± 10.7	30.9 ± 12.6	0.008	0.008

Data are presented as 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.

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