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. 2015 May 18;6:106. doi: 10.3389/fneur.2015.00106

Table 2.

Cognitive performance of participants.

	PD	ET-PD	Significance
n	53	30
TICS score	35.0 ± 2.0 (35.0)	31.7 ± 3.9 (32.0)	p < 0.001^a
MMSE score	28.4 ± 2.2 (29.0)	26.5 ± 3.1 (28.0)	p = 0.001^a
Subscores
Orientation	19.8 ± 0.8 (20.0)	19.1 ± 1.5 (20.0)	p < 0.001^a
Language	9.9 ± 0.3 (10.0)	9.0 ± 1.0 (9.0)	p < 0.001^a
Working memory	14.2 ± 1.5 (15.0)	12.3 ± 3.1 (14.0)	p = 0.001^a
Delayed memory	2.1 ± 1.0 (2.0)	1.8 ± 0.9 (2.0)	p = 0.06^a
Motor/construction	1.8 ± 0.5 (2.0)	1.7 ± 0.6 (2.0)	p = 0.22^a

Values are mean ± SD (median).

ET, essential tremor; MMSE, Folstein Mini-Mental State Examination; PD, Parkinson’s disease; TICS, telephone interview for cognitive status.

^aMann–Whitney test.