. Author manuscript; available in PMC: 2013 Dec 9.

Published in final edited form as: J Neurol Neurosurg Psychiatry. 2010 Aug 27;82(9):10.1136/jnnp.2010.213330. doi: 10.1136/jnnp.2010.213330

Table 1. Demographic characteristics of essential tremor cases and controls.

	ET	All controls (non-diseased controls and PSP)	Non-diseased controls	Diseased controls (PSP)
N^‡	35	32	21	11
Age (years)	84.9±6.5	74.5±13.6^†	74.9±16.2^*	73.7±7.1^†
Female gender	22 (62.9)	11 (35.5)^*	7 (33.3)^*	4 (36.4)
Brain weight (g)	1205±146	1245±176	1301±178^*	1137±117^*
Postmortem interval (h)	5.9±3.0	8.5±7.9	8.7±8.4	8.2±7.5
Braak AD stage	2.1±1.1	1.0±1.3^†	0.8±1.4^†	1.3±0.9^†
CERAD plaque score^§	0.9±1.1	0.4±0.7	0.4±0.8	0.4±0.7
PC count	35.1±11.7	43.2±17.8^*	47.9±17.9^†	32.3±12.2
HPCs	3.8±3.6, 3 (0–14)	1.6±1.7, 1 (0–5)^†	1.9±1.8, 1 (0–5)^*	1.1±1.2, 1 (0–4)^*

Mean±SD and frequency (%) are reported.

p <0.05.

^†

p <0.01, comparing each group to ET cases.

^‡

Four outliers were excluded.

^§

CERAD plaque scores were converted from letters to numbers: 0 indicates absent; 1, sparse; 2, moderate; and 3, severe.

AD, Alzheimer's disease; CERAD, Consortium to Establish a Registry for AD; ET, essential tremor; HPC, heterotopic Purkinje cell; PC, Purkinje cell; PSP, progressive supranuclear palsy.