Verbal Episodic Memory and Endogenous Estradiol:Am Association in Patients with Mid Cognitive Impairment and Alzheimer's Disease

摘要

In the continuum of patients with Alzheimer's disease (AD), mild cognitive impairment (MCI), and normal controls, a possible association of verbal memory and endogenous estradiol (E_2) levels was investigated. Verbal episodic memory was measured with a german version of the California verbal memory test (CVLT). Results were controlled for apolipoprotein E (ApoE) phenotype. We studied 37 controls, 32 MCIs and 117 ADs. Groups differed in all trials of the CVLT (P < 0.001) and in E_2 levels (P < 0.001). E2 levels differed significantly between groups only among females (P < 0.001). In females correcting for age and ApoE, there was an overall correlation between CVLT delayed recall and level of E_2 (P = 0.025). Stepwise regression analyses found E_2 level to be a significant predictor for CVLT delayed recall (P < 0.001). It maybe concluded that lower E_2 levels occur more in the course of the disease than may be considered as a risk factor per se.