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. Author manuscript; available in PMC: 2020 Jul 26.

Published in final edited form as: Parkinsonism Relat Disord. 2019 May 4;64:262–267. doi: 10.1016/j.parkreldis.2019.05.002

Table 1.

Demographic data of the ET dataset from the discovery stage of the most recent ET GWAS (adapted from Muller et al. [15]).

Discovery stage

	Cohort	N	Sex (%Female)	Age (Mean ± SD; N = missing)	Age of Onset (Mean ± SD; N = missing)
Cases
	Europe	887	37.1	62.34( ± 14.64; N = 25)	39.41( ± 21.95; N = 94)
	North America	891	53.2	69.88( ± 14.45; N = 590)	50.20( ± 22.73; N = 299)
	Total	1,778	45.2	64.29( ± 14.96; N = 615)	44.02( ± 22.91; N = 393)
Controls
	Europe	4,603	49.8	50.37( ± 14.13; N = 8)	–
	North America	773	56.0	NA (N = 773)	–
	Total	5,376	50.7	50.37( ± 14.13; N = 781)	—

Abbreviations: ET = essential tremor; N = number; SD = standard deviation.