The recency ratio as predictor of early MCI

Author:

Bruno Davide,Koscik Rebecca L.,Woodard John L.,Pomara Nunzio,Johnson Sterling C.

Abstract

ABSTRACTObjectives:Individuals with Alzheimer's disease (AD) present poor immediate primacy recall accompanied by intact or exaggerated recency, which then tends to decline after a delay. Bruno et al. (Journal of Clinical and Experimental Neuropsychology, Vol. 38, 2016, pp. 967–973) have shown that higher ratio scores between immediate and delayed recency (i.e. the recency ratio; Rr) are associated with cognitive decline in high-functioning older individuals. We tested whether Rr predicted conversion to early mild cognitive impairment (early MCI) from a cognitively healthy baseline.Design:Data were analyzed longitudinally with binomial regression. Baseline scores were used to predict conversion to early MCI after approximately nine years. Setting: Data were collected at the Wisconsin Registry of Alzheimer's Prevention, in Madison, Wisconsin.Participants:For the study, 427 individuals were included in the analysis; all participants were 50 years of age or older and cognitively intact at baseline, and were native English speakers.Measurements:Memory data were collected using the Rey's Auditory Verbal Learning Test, and the early MCI diagnosis was obtained via consensus conference.Results:Our results showed that higher Rr scores are correlated with greater risk of later early MCI diagnosis, and this association is independent of total recall performance.Conclusions:Rr is an emerging cognitive marker of cognitive decline.

Publisher

Cambridge University Press (CUP)

Subject

Psychiatry and Mental health,Geriatrics and Gerontology,Gerontology,Clinical Psychology

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