Table 1.

Demographic and clinical features of 376 ET cases

Demographic and clinical features	Familial ET (n = 232)	Sporadic ET (n = 144)	All Cases (n = 376)
Current age in years	66.6 ± 15.8 Median = 71	68.9 ± 14.0 Median = 71	67.5 ± 15.1 Median = 71
Female gender	124 (53.4)	72 (50.0)	196 (52.1)
Education in years	15.4 ± 3.6	14.7 ± 4.1	15.1 ± 3.8
Total tremor score *	19.5 ± 7.2	17.6 ± 7.2	18.8 ± 7.2
Tremor duration in years *	27.5 ± 19.2	15.0 ± 14.9	22.8 ± 18.7
Age of tremor onset in years *	39.1 ± 22.2	53.9 ± 19.8	44.7 ± 22.5
Currently taking medication for tremor *	139 (59.9)	65 (45.1)	204 (54.3)

All values are means ± standard deviations or proportions (percentages).

^*p <0.05 (familial ET vs. sporadic ET).