Outcomes and Adverse Effects of Deep Brain Stimulation on the Ventral Intermediate Nucleus in Patients with Essential Tremor

Table 2

Statistical difference of patient characteristics among laterality and stimulation parameter (pulse width and voltage) subgroups^a.

	Laterality			Voltage (V)			Pulse widths (μs)
	Unilateral	Bilateral	value	≥3.5	<3.5	value	60-90	90-120	value
Age at surgery (years)			0.115			0.375			0.782
Disease duration (years)			0.022^b			0.247			0.205
Follow-up (months)			0.224			0.245			0.447

^aThe data are represented by “”. ^bThe disease duration of bilateral procedure is almost missing, and only one data exists, so there are large biases in the significant comparison.