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. Author manuscript; available in PMC: 2026 Oct 8.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2021 Aug 25;112(1):121–130. doi: 10.1016/j.ijrobp.2021.08.021

Table 1.

Patient demographics.

Demographics Median/Frequency IQR/Percent
Age 76 71–82
Gender
Male 22 67%
Female 11 33%
Race
 Caucasian 29 88%
 African American 4 12%
Diagnosis
 ET 23 70%
 PD 10 30%
Duration of tremor from initial symptoms (yrs) 8 4–20
Family History 7 21%
Treated Extremity Contralateral to Brain Target
 Left 5 15%
 Right 28 85%
Dmax (Gy) 160 156–160

Abbreviations: IQR (interquartile range); ET (essential tremor); PD (Parkinson’s disease); Gy (Gray); Dmax (maximum dose).