Neurocognitive subgroups in major depressive disorder.

Journal Article (Journal Article)

Background

Major depressive disorder (MDD) is commonly associated with neurocognitive dysfunction. However, there remains substantial heterogeneity between patients and inconsistent findings regarding the magnitude and prevalence of specific neurocognitive deficits. This study aimed to investigate the potential for different neurocognitive subgroups in patients diagnosed with MDD.

Method

Data were pooled from 4 different clinical trials that involved adults diagnosed with MDD. Neurocognitive outcomes included measures of verbal learning and memory, executive function, attention, and processing speed. Latent class analysis was conducted to examine for different subgroups based on neurocognitive profiles of performance across outcome measures. Subgroups were compared to a separate sample of age-matched adult healthy controls, across illness factors, and individual mood items on the Montgomery-Åsberg Depression Rating Scale (MADRS).

Results

Within the MDD cohort (N = 149), 45% of participants were considered relatively "cognitively preserved," with the remainder "cognitively reduced" (39%) or "cognitively impaired" (16%). Verbal memory performance was significantly poorer compared to attention and processing speed only in the "cognitively impaired" subgroup. There was no association between subgroup membership and relevant illness factors, including ratings on individual MADRS items.

Limitations

Data were pooled from several studies that included different neurocognitive measures and cohorts.

Conclusions

Approximately half of MDD participants had no or minimal objective cognitive difficulties, and neurocognitive functioning was found generally unrelated to illness factors. Future longitudinal research is warranted to determine whether the people who are relatively cognitively impaired are at increased risk for further cognitive decline. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Full Text

Duke Authors

Cited Authors

  • Martin, DM; Wollny-Huttarsch, D; Nikolin, S; McClintock, SM; Alonzo, A; Lisanby, SH; Loo, CK

Published Date

  • September 2020

Published In

Volume / Issue

  • 34 / 6

Start / End Page

  • 726 - 734

PubMed ID

  • 32324004

Pubmed Central ID

  • 32324004

Electronic International Standard Serial Number (EISSN)

  • 1931-1559

International Standard Serial Number (ISSN)

  • 0894-4105

Digital Object Identifier (DOI)

  • 10.1037/neu0000626

Language

  • eng