Table 1. Clinical Characteristics of Tremor in Included Subjects.

Subject	Current Age	Age Onset1	Location	Severity (arm)2
III.7	80	16	Arms/head/voice	3
III.9	78	50	Arms/head/voice	3
III.11	70	40	Arms/head/voice	3
IV.8	51	35	Arms3	2
IV.12	56	20	Arms/head	2
IV.17	42	38	Head	0 (only head)
IV.21	48	45	Arms	2
IV.27	48	20	Arms	2
IV.28	42	14	Arms	3
Mean (±SD)	57.2 (±14.9)	30.9 (±13.5)

¹Approximate age reported by the subjects.

²Washington Heights–Inwood Genetic Study of Essential Tremor Severity Score.

³Mild cervical dystonia.