. Author manuscript; available in PMC: 2013 Jun 29.

Published in final edited form as: J Neurol Neurosurg Psychiatry. 2011 Mar 24;82(7):761–765. doi: 10.1136/jnnp.2010.229740

Table 2.

Tremor severity and change in tremor severity in essential tremor cases

	ET cases enrolled in an epidemiological study (n=44)	ET cases enrolled in a brain donor programme (n=39)
Baseline TTS	18.6±6.6	23.8±5.7
Follow-up TTS	20.8±5.7	25.5±7.1
Change in TTS	2.2±4.3	1.9±4.1
Time elapsed between baseline and follow-up evaluations (years)	5.7±2.5	4.3±1.4
Annual change in TTS	0.32±0.89	0.64±1.49
Annual % increase in TTS from mean baseline TTS score	5.3±17.1 (median 1.8)	3.1±8.1 (median 2.0)

Values are mean±SD or number (%).

ET, essential tremor; TTS, Total Tremor Score (range 0–36).