Comparison of Baseline Cognitive Testing Results in Mild Cognitive Impairment Subtypes in the NACC Database
Year: 2023
Type: article
Abstract: Background Mild cognitive impairment (MCI) reflects cognitive deficits without significant functional decline in activities of daily living. MCI subtypes correspond to phenotypic cognitive impairment patterns in memory, attention, language, executive, and visuospatial compared to age‐adjusted norms: Amnestic single domain (ASD) or multi‐domain (AMD), Nonamestic single domain (NASD), or Nonamnestic multi‐domain (NAMD). Previous studies have suggested Nonanmestic subtypes demonstrate more likely represent non‐AD prodromes, but conclusions have been limited by small sample sizes. The present study attempts to see correlates of htese proposed differences as evident by cognitive testing battery. Method Using the National Alzheimer’s Coordinating Center (NACC) database (grant U24 AG072122), we selected all initial Uniform Data Set (UDS) assessments diagnosed as MCI with subtyping. The NACC data was collected from 37 participating Alzheimer’s disease Research Centers. Baseline demographic, clinical features, Neuropsychiatric symptoms, and AD biomarkers were collected. One‐way ANOVA analyses were used to compare cognitive performance on all UDS cognitive tests across MCI subtypes. Result 9852 individuals with MCI on baseline UDS visits were analyzed: 45.4% AMD, 33.7% ASD, 12.6% NASD, 8.2% NAMD. There were significant differences (P<.001 or greater) on all measures which is not unexpected given large sample size. Notable differences between ASD/AMD, NASD/NAMD were prominent on Trails B, Craft story immediate and delayed recall, and Benton immediate recall minus delayed recall. See table for complete summary of scores.Trails B, mean (SD) times were ASD (113±62), AMD (157±82), NASD (143±78),NAMD (171±83). Craft story showed clear differences between groups on immediate recall (ASD14.9 (6.4)/AMD 14.2 (6.76)/NASD 18.0 (8.0/NAMD 17.9 (6.9)) and delayed recall (ASD 9.9 (7.0)/AMD 10.1 (6.7)/NASD 15.2 (6.4)/NAMD 15.5 (6.2)). Benton immediate minus delayed recall differences were ASD 8.1/AMD 7.9 versus NASD 4.2, NAMD 4.9) Conclusion Nonamnestic MCI subtypes are characterized by lower performance on executive tasks such as Trails B. Conversely, memory tasks show lower performance in NACC UDS participants with amnestic subtypes of MCI. This would support the concept that Nonamnestic MCI may represent prodromal stages of non‐AD dementia more frequently.
Source: Alzheimer s & Dementia
DOI: 10.1002/alz.075943
Authors: Alan J. Lerner, Brian Appleby, Mohamed Elkasaby, James B Leverenz, Joseph Malone, Lindsay J Miller‐Scott, Tamara B Murphy, Paula K. Ogrocki, Jagan A. Pillai, Charles Duffy
Language: English
Subfield: Psychiatry and Mental health
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W4390193574