Facial Emotion Recognition Impairment in Patients with Parkinson's Disease and Isolated Apathy

Table 2

Errors (%) on the facial emotion recognition test.

	Apathy group	Nonapathy group	Healthy controls	P value
				(post hoc)
Happiness	13.89 (17.16)	4.38 (7.54)	8.89 (10.66)	.097 (0.12)
Surprise	23.61 (18.06)	22.81 (20.19)	25.55 (27.36)	.937 (0.96)
Fear	69.44 (28.28)	40.35 (25.04)	36.66 (34.62)	.012 (.032)
Disgust	34.72 (20.66)	55.26 (24.25)	46.66 (28.31)	.092 (0.14)
Anger	38.89 (22.84)	18.42 (19.95)	18.89 (18.75)	.018 (.038)
Sadness	56.94 (33.68)	26.31 (21.74)	35.55 (30.12)	.018 (.031)
Total errors	39.35 (7.57)	27.77 (10.55)	28.33 (10.61)	.006 (.012)

Note that means and standard deviations (in parentheses). Difference between groups using univariate analysis of variance comparisons. Post hoc: “P” values after adjusting for age. Education, and MDRS total score.