Table 1:

Characteristics of the patients with ET and control subjects^*

Characteristic	Controls	a-ET	h-ET	P Value
Sex (M/F)	16/16	18/12	6/14	.11†
Age, yr	66.2 (8.1)	61.5 (16.5)	70.6 (7.6)	.03‡
Age at onset, yr		43.0 (18.9)	49.9 (16.9)	.18§
Duration of ET, yr		18.6 (15.1)	20.4 (14.7)	.70§
Fahn-TRS-A scale		8.50 (2–17)	12.50 (5–16)	.003‖
Bain scale		34.0 (25–65)	41.50 (30–66)	.011‖

Note:—ET indicates essential tremor; a-ET, arm tremor; h-ET, arm and head tremor; Fahn-TRS-A, Fahn-Tolosa-Martin Tremor Rating Scale, Part A.

^*Data are given as mean values (SD) or median values (range) when appropriate.

^†χ² test.

^‡One-way ANOVA, followed by unpaired t test, corrected according to Bonferroni.

^§Unpaired test.

^‖Mann-Whitney U test.