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. 2024 Jun 29;14(7):669.
doi: 10.3390/brainsci14070669.

Verbal Learning and Memory Deficits across Neurological and Neuropsychiatric Disorders: Insights from an ENIGMA Mega Analysis

Eamonn Kennedy  1   2   3 Spencer W Liebel  1   3 Hannah M Lindsey  1   3 Shashank Vadlamani  1 Pui-Wa Lei  4 Maheen M Adamson  5   6 Martin Alda  7 Silvia Alonso-Lana  8   9   10 Tim J Anderson  11   12   13 Celso Arango  9   14 Robert F Asarnow  15   16   17 Mihai Avram  18 Rosa Ayesa-Arriola  9   19 Talin Babikian  15   20 Nerisa Banaj  21 Laura J Bird  22 Stefan Borgwardt  18   23 Amy Brodtmann  24   25 Katharina Brosch  26   27 Karen Caeyenberghs  28 Vince D Calhoun  29 Nancy D Chiaravalloti  30   31 David X Cifu  32 Benedicto Crespo-Facorro  9   33 John C Dalrymple-Alford  11   12   34 Kristen Dams-O'Connor  35   36 Udo Dannlowski  37 David Darby  38   39   40 Nicholas Davenport  41   42 John DeLuca  31   43 Covadonga M Diaz-Caneja  14 Seth G Disner  41   42 Ekaterina Dobryakova  31   44 Stefan Ehrlich  45   46 Carrie Esopenko  35 Fabio Ferrarelli  47 Lea E Frank  48 Carol E Franz  49   50 Paola Fuentes-Claramonte  8   9 Helen Genova  31   51 Christopher C Giza  20   52   53 Janik Goltermann  37 Dominik Grotegerd  37 Marius Gruber  37   54 Alfonso Gutierrez-Zotes  9   55   56 Minji Ha  57 Jan Haavik  58   59 Charles Hinkin  15 Kristen R Hoskinson  60   61 Daniela Hubl  62 Andrei Irimia  63   64   65 Andreas Jansen  26 Michael Kaess  66   67 Xiaojian Kang  5 Kimbra Kenney  68 Barbora Keřková  69 Mohamed Salah Khlif  70 Minah Kim  71   72 Jochen Kindler  66 Tilo Kircher  26 Karolina Knížková  69   73 Knut K Kolskår  74   75   76 Denise Krch  31   44 William S Kremen  49   50 Taylor Kuhn  15 Veena Kumari  77 Junsoo Kwon  57   71   72 Roberto Langella  21 Sarah Laskowitz  78 Jungha Lee  57 Jean Lengenfelder  31   44 Victoria Liou-Johnson  5 Sara M Lippa  79   80 Marianne Løvstad  75   76 Astri J Lundervold  81 Cassandra Marotta  38   39 Craig A Marquardt  41   42 Paulo Mattos  82 Ahmad Mayeli  47 Carrie R McDonald  83   84 Susanne Meinert  37   85 Tracy R Melzer  11   12   34 Jessica Merchán-Naranjo  14 Chantal Michel  66 Rajendra A Morey  78   86 Benson Mwangi  87 Daniel J Myall  12 Igor Nenadić  26 Mary R Newsome  1   3 Abraham Nunes  7   88 Terence O'Brien  25   89 Viola Oertel  90 John Ollinger  79 Alexander Olsen  91   92   93 Victor Ortiz García de la Foz  19 Mustafa Ozmen  2   94 Heath Pardoe  40 Marise Parent  95 Fabrizio Piras  21 Federica Piras  21 Edith Pomarol-Clotet  8   9 Jonathan Repple  37   54 Geneviève Richard  74 Jonathan Rodriguez  49 Mabel Rodriguez  69 Kelly Rootes-Murdy  29 Jared Rowland  96   97   98 Nicholas P Ryan  99   100 Raymond Salvador  8   9 Anne-Marthe Sanders  74   75   76 Andre Schmidt  101 Jair C Soares  87 Gianfranco Spalleta  21 Filip Španiel  69   102 Scott R Sponheim  41   42 Alena Stasenko  49   84 Frederike Stein  26 Benjamin Straube  26 April Thames  15 Florian Thomas-Odenthal  26 Sophia I Thomopoulos  103 Erin B Tone  104 Ivan Torres  105   106 Maya Troyanskaya  107   108 Jessica A Turner  109 Kristine M Ulrichsen  74   75   76 Guillermo Umpierrez  110 Daniela Vecchio  21 Elisabet Vilella  9   55   56 Lucy Vivash  38   39 William C Walker  111   112 Emilio Werden  40 Lars T Westlye  74   75   113 Krista Wild  114 Adrian Wroblewski  26 Mon-Ju Wu  87 Glenn R Wylie  31   115 Lakshmi N Yatham  105 Giovana B Zunta-Soares  87 Paul M Thompson  103   116 Mary Jo Pugh  1   2 David F Tate  1   3 Frank G Hillary  117   118   119 Elisabeth A Wilde  1   3 Emily L Dennis  1   3
Affiliations

Verbal Learning and Memory Deficits across Neurological and Neuropsychiatric Disorders: Insights from an ENIGMA Mega Analysis

Eamonn Kennedy et al. Brain Sci. .

Abstract

Deficits in memory performance have been linked to a wide range of neurological and neuropsychiatric conditions. While many studies have assessed the memory impacts of individual conditions, this study considers a broader perspective by evaluating how memory recall is differentially associated with nine common neuropsychiatric conditions using data drawn from 55 international studies, aggregating 15,883 unique participants aged 15-90. The effects of dementia, mild cognitive impairment, Parkinson's disease, traumatic brain injury, stroke, depression, attention-deficit/hyperactivity disorder (ADHD), schizophrenia, and bipolar disorder on immediate, short-, and long-delay verbal learning and memory (VLM) scores were estimated relative to matched healthy individuals. Random forest models identified age, years of education, and site as important VLM covariates. A Bayesian harmonization approach was used to isolate and remove site effects. Regression estimated the adjusted association of each clinical group with VLM scores. Memory deficits were strongly associated with dementia and schizophrenia (p < 0.001), while neither depression nor ADHD showed consistent associations with VLM scores (p > 0.05). Differences associated with clinical conditions were larger for longer delayed recall duration items. By comparing VLM across clinical conditions, this study provides a foundation for enhanced diagnostic precision and offers new insights into disease management of comorbid disorders.

Keywords: Parkinson’s disease; attention-deficit/hyperactivity disorder; bipolar disorder; dementia; depression; memory; schizophrenia; stroke; traumatic brain injury; verbal learning.

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Conflict of interest statement

Celso Arango has been a consultant to or has received honoraria or grants from Abbot, Acadia, Ambrosetti, Angelini, Biogen, Boehringer, Gedeon Richter, Janssen Cilag, Lundbeck, Medscape, Menarini, Minerva, Otsuka, Pfizer, Roche, Sage, Servier, Shire, Schering Plough, Sumitomo Dainippon Pharma, Sunovion, Takeda, and Teva. Amy Brodtmann serves on the editorial boards of Neurology and International Journal of Stroke. Benedicto Crespo-Facorro has been a consultant to or has received honoraria or grants from Angelini, Boehringer, Johnson, Lundbeck, Otsuka, and Rovi. Covadonga M. Diaz-Caneja has received honoraria from Angelini and Viatris. Christopher C. Giza has been a consultant to the NBA, NFL, NHLPA, and Los Angeles Lakers, he has served on the advisory board for Highmark Interactive, Novartis, MLS, NBA, and USSF, and he handles 1–2 medicolegal cases annually. Jonathan Repple has received speaking honoraria from Janssen and Hexal. Jair C. Soares has been a consultant to, has received honoraria or grants from, or has stock in Alkermes, Allergan, Asofarma, ATAI, Boehringer Ingelheim, Compass, Johnson & Johnson, Livanova, Pfizer, Pulvinar Neuro LLC, Relmada, Sanofi, and Sunovian. Paul M. Thompson received partial research support from Biogen, Inc., for research unrelated to this manuscript. Lucy Vivash received partial research support for this project by an investigator-initiated research grant from Biogen (US). Biogen had no role in the analysis or writing of this manuscript. Additionally, Lucy Vivash received support from Eisai (JP) and Life Molecular Imaging for research unrelated to this manuscript. Glenn R. Wylie has received research support from the NJ Commission for Brain Injury Research, the Dept of Veterans Affairs, Biogen, Bristol, Myers, Squibb, and Genetech, and he has served on advisory boards for the CDMRP and the VA; all of these activities are unrelated to this research. Lakshmi N. Yatham has been on speaker or advisory boards for, or has received research grants from, Alkermes, Abbvie, Canadian Institutes of Health Research, Sumitomo Dainippon Pharma, GlaxoSmithKline, Intracellular Therapies, Merck, Sanofi, Sequiris, Servier, and Sunovion, all outside this work. David F. Tate received funding from the Defense and Veterans Brain Injury Centers, the U.S. Army Medical Research and Materiel Command, and the Chronic Effects of Neurotrauma Consortium (CENC). The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results. All other authors declare no conflicts of interest. The views expressed in this article are those of the author(s) and do not reflect the official policy of the Department of Army/Navy/Air Force, Department of Defense, or U.S. Government.

Figures

Figure 1
Figure 1
World map showing the locations of participating collaborator institutions (triangles). Details for each sub-study are provided in Supplementary Table S1.
Figure 2
Figure 2
Preliminary screening of covariates by random forest models. In (a), feature importances identified age, education, and site as the most important variables for adjustment. In (b), raw Trials 1–5 scores are plotted against Trials 1–5 scores after source correction (color indicates origin study). Gray lines show the fits used to correct for each site.
Figure 3
Figure 3
Percentage changes in words recalled are shown for each clinical group relative to matched controls. Numerical data for this figure are available in Supplementary Table S2. MDD = major depressive disorder. ADHD = attention-deficit/hyperactivity disorder. TBI = traumatic brain injury. BD = bipolar disorder. PD = Parkinson’s disease. SZ = schizophrenia. MCI = mild cognitive impairment. AD/RD = Alzheimer’s disease and related dementias. T1 = immediate recall trial 1. Trials 1–5 = total score across immediate recall/learning trials 1–5. SDFR = short-delay free recall. LDFR = long-delay free recall. * significant at p < 0.01 for all four items.
Figure 4
Figure 4
Age- (a) and sex/gender- (b) stratified percentage score differences across female/male and above/below median age groups relative to matched controls. MDD = major depressive disorder. ADHD = attention-deficit/hyperactivity disorder. TBI = traumatic brain injury. BD = bipolar disorder. PD = Parkinson’s disease. SZ = schizophrenia. MCI = mild cognitive impairment. AD/RD = Alzheimer’s disease and related dementias. T1 = immediate recall trial 1. Trials 1–5 = total score across immediate recall/learning trials 1–5. SDFR = short-delay free recall. LDFR = long-delay free recall.

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