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Table 1 Clinical characteristics of patients with "pure" ET and tremor associated with dystonia.

From: Clustering of dystonia in some pedigrees with autosomal dominant essential tremor suggests the existence of a distinct subtype of essential tremor

  "Pure" tremor ET associated with dystonia Isolated dystonia
Number of subjects 365 (144 M/221 F) 87 (35 M/52 F) 10 (5 M/5 F)
Average age (years) 48.32 ± 14.16 51.08 ± 10.80 49.45 ± 9.87
WHIGET scores 14.21 ± 6.78 12.81 ± 5.76 N/A
Age of Onset (years) 36.56 ± 17.65 32.78 ± 12.11 29.34 ± 19.45