Anosognosia in mild cognitive impairment and mild Alzheimer's disease: frequency and neuropsychological correlates.

Objectives: To evaluate severity of anosognosia and to identify its neuropsychological correlates in preclinical and clinical Alzheimer's Disease (AD).

Methods: The Clinical Insight Rating Scale, the Anosognosia Questionnaire for Dementia (AQ-D), and the Mental Deterioration Battery were used to assess anosognosia and cognitive performances in mild AD (N = 38), amnesic mild cognitive impairment (a-MCI; N = 35), and multiple domain MCI (md-MCI; N = 38).

Results: Patients with mild AD were more anosognosic than both MCI groups, which, however, did not differ from one other.