[en] A major challenge in diagnosing post COVID lies in differentiating symptoms following a confirmed SARS-CoV-2 infection from those that may also occur in uninfected individuals (post COVID mimics) and be associated with a broader impact of the pandemic. The WHO post COVID definition was applied to the Luxembourgish longitudinal CON-VINCE cohort, where SARS-CoV-2 infection was confirmed via either a positive RT-qPCR or a serology test. Risk factor analysis was conducted on 1,865 individuals. Female gender, lower resilience, greater loneliness, and a higher number of comorbidities were associated with symptoms persistence. The symptomatology and comorbidity profiles of 559 participants (including 50 post COVID and 66 post COVID mimics) were investigated. Two distinct clusters of persistent symptoms were identified: (1) depression with anxiety, present in both infected and non-infected groups, and (2) memory impairment with fatigue, unique to the post COVID group. Therefore, presence of both memory impairment and fatigue may help differentiate post COVID patients from post COVID mimics. Yet, verification that memory impairment was newly developed was not possible, as this symptom was not recorded at baseline. Our findings suggest that future studies should consider factors affecting development of persistent post COVID-like symptoms observed in individuals that were never infected.
Disciplines :
Immunology & infectious disease Public health, health care sciences & services
Author, co-author :
MARTINS CONDE, Patricia ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Digital Medicine
Bulaev, Dmitry; Luxembourg Institute of Health, Strassen, Luxembourg
RAUSCHENBERGER, Armin ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine > Biomedical Data Science > Team Enrico GLAAB ; Luxembourg Institute of Health, Strassen, Luxembourg
OHNMACHT, Jochen ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine > Translational Neuroscience > Team Rejko KRÜGER ; Luxembourg Institute of Health, Strassen, Luxembourg
Fritz, Joëlle V; Luxembourg Institute of Health, Strassen, Luxembourg
O'Sullivan, Marc P; Luxembourg Institute of Health, Strassen, Luxembourg ; Eurostat, European Commission, Luxembourg City, Luxembourg
ANCIEN, François ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Clinical and Translational Informatics
GHOSH, Soumyabrata ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Bioinformatics Core
TSURKALENKO, Olena ; University of Luxembourg ; Luxembourg Institute of Health, Strassen, Luxembourg ; Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg
KOLODKIN, Alexey ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine > Bioinformatics Core > R3 and IT infrastructure ; Luxembourg Institute of Health, Strassen, Luxembourg
SATAGOPAM, Venkata ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Clinical and Translational Informatics
Vaillant, Michel; Luxembourg Institute of Health, Strassen, Luxembourg
KLUCKEN, Jochen ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Digital Medicine ; Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg
KRÜGER, Rejko ; University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) > Translational Neuroscience ; Luxembourg Institute of Health, Strassen, Luxembourg ; Centre Hospitalier de Luxembourg, Luxembourg, Luxembourg
Fonds National de la Recherche Luxembourg André Losch Fondation European Commission
Funding text :
We would like to give special thanks to all participants of the CON-VINCE study and to each volunteer that helped in sample processing or sample kit preparation. Additionally, we are very grateful for the financial support by the Fonds National de la Recherche and the Andr\u00E9 Losch Foundation, which enabled us to carry out the project. The funders had no role in the design and conduct of the study, nor in the decision to prepare and submit the manuscript for publication. We also would like to thank the Ministry of Health of Luxembourg as well as the Directorate of Health of Luxembourg for their support. We acknowledge the joint effort of the CON-VINCE team involved in sample and data collection. We would like to thank the Research Luxembourg COVID-19 Task Force (Frank Glod, Paul Wilmes, Lars Geffers, Jasmin Schulz, Henry-Michel Cauchie, Ulf Nehrbass, Rudi Balling) for their overall support of the CON-VINCE study. A special thanks also to the data protection officers Sandrine Munoz and Laurent Pr\u00E9votat. Furthermore, we would like to acknowledge the whole Communication teams involved within CON-VINCE, especially Sabine Schmitz, Arnaud D\u2019Agostini, Didier Gossens, H\u00E9l\u00E8ne Jacuszin for their excellent work and support during the implementation and execution of CON-VINCE. We would like to thank Monica Marchese for her support and thank Philippe Lamesch for important and successful fundraising for research on COVID-19 in Luxembourg.This project was supported by the National Research Fund Luxembourg (FNR) \u2013 FNR PEARL Chairs 14146272/dHealthPD/Klucken. The CON-VINCE Study was funded by the National Research Fund Luxembourg (FNR 14716281/CON-VINCE/Kruger) and the Andr\u00E9 Losch Foundation (Luxembourg). The ORCHESTRA project has received funding from the European Union\u2019s Horizon 2020 research and innovation program under grant agreement No 101016167. The COMMUTE project has received funding from the Horizon Europe research program under agreement No 101136957. The views expressed in this paper are those of the author(s) and do not necessarily reflect those of the European Union or the Health and Digital Executive Agency. Neither the European Union nor the granting authority can be held responsible for them. For the purpose of open access, and in fulfilment of the obligations arising from the grant agreement, the author has applied a Creative Commons Attribution 4.0 International (CC BY 4.0) license to any Author Accepted Manuscript version arising from this submission.
K. Koelle et al. The changing epidemiology of SARS-CoV-2 Science 375 6585 1116 1121 2022Sci..375.1116K 10.1126/science.abm4915 35271324 9009722
K. Dhama et al. Coronavirus disease 2019–COVID-19 Clin. Microbiol. Rev. 10.1128/cmr.00028-20;10.1128/cmr.00028-20 32580969 7405836
E. Mahase Covid-19: What do we know about “long covid”? BMJ 370 m2815 10.1136/bmj.m2815 32665317
M. Parotto et al. Post-acute sequelae of COVID-19: Understanding and addressing the burden of multisystem manifestations Lancet Respir. Med. 11 8 739 754 10.1016/S2213-2600(23)00239-4 37475125
Meeting the challenge of long COVID. Nat. Med.26(12), 1803. https://doi.org/10.1038/s41591-020-01177-6 (2020).
World Health Organisation (WHO). Post COVID-19 condition (Long COVID). Accessed 31 Mar 2025; Available from: https://www.who.int/europe/news-room/fact-sheets/item/post-covid-19-condition (2022).
J.B. Soriano et al. A clinical case definition of post-COVID-19 condition by a Delphi consensus Lancet Infect. Dis. 22 4 e102 e107 10.1016/S1473-3099(21)00703-9 34951953
J.V.A. Franco et al. Long-term health symptoms and sequelae following SARS-CoV-2 infection: An evidence map Int. J. Environ. Res. Public Health 19 16 9915 10.3390/ijerph19169915 36011562 9408764
H.E. Davis et al. Characterizing long COVID in an international cohort: 7 months of symptoms and their impact EClinicalMedicine 38 101019 10.1016/j.eclinm.2021.101019 34308300 8280690
S. Su et al. Epidemiology, clinical presentation, pathophysiology, and management of long COVID: An update Mol. Psychiatry 28 10 4056 4069 10.1038/s41380-023-02171-3 37491461
H.E. Davis et al. Long COVID: Major findings, mechanisms and recommendations Nat. Rev. Microbiol. 21 3 133 146 10.1038/s41579-022-00846-2 36639608 9839201
F. Bai et al. Female gender is associated with long COVID syndrome: A prospective cohort study Clin. Microbiol. Infect. 28 4 611 10.1016/j.cmi.2021.11.002
M.J. Peluso S.G. Deeks Mechanisms of long COVID and the path toward therapeutics Cell 187 20 5500 5529 10.1016/j.cell.2024.07.054 39326415 11455603
T. Greenhalgh et al. Long COVID: A clinical update Lancet 404 10453 707 724 10.1016/s0140-6736(24)01136-x 39096925
T.L. Wong D.J. Weitzer Long COVID and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS)-a systemic review and comparison of clinical presentation and symptomatology Medicina 10.3390/medicina57050418 34833386 8625550
F.B. Løkke et al. Long-term complications after infection with SARS-CoV-1, influenza and MERS-CoV—Lessons to learn in long COVID? Infect. Dis. Now 53 8 104779 10.1016/j.idnow.2023.104779 37678512
M. Goldman Long Covid, a great imitator of the 21th century Front. Med. 10.3389/fmed.2022.1026425
N.K. Fauk et al. Impact of COVID-19 lockdowns on the activity and mental health of older people in Indonesia: A qualitative study Int. J. Environ. Res. Public Health 19 20 13115 10.3390/ijerph192013115 36293704 9603281
P.J. Chen et al. An overview of mental health during the COVID-19 pandemic Diagnosis 8 4 403 412 10.1515/dx-2021-0046 34214386
O. Tsurkalenko et al. Creation of a pandemic memory by tracing COVID-19 infections and immunity in Luxembourg (CON-VINCE) BMC Infect. Dis. 24 179 10.1186/s12879-024-09055-z 38336649 10858600
Europe ORCHESTRA. Connecting European Cohorts to increase common and effective response to SARS-CoV2 Pandemic. Accessed 31 Mar 2025; Available from: https://orchestra-cohort.eu/ (2022).
L.S. Radloff The CES-D scale: A self-report depression scale for research in the general population Appl. Psychol. Meas. 1 3 385 401 10.1177/014662167700100306
R. Jahn et al. Criterion validity of the German version of the CES-D in the general population Psychiatr. Prax. 45 8 434 442 10.1055/a-0584-9803 29665610
R.L. Spitzer et al. A brief measure for assessing generalized anxiety disorder: The GAD-7 Arch. Intern. Med. 166 10 1092 1097 10.1001/archinte.166.10.1092 16717171
A. Hinz et al. Psychometric evaluation of the Generalized Anxiety Disorder Screener GAD-7, based on a large German general population sample J Affect Disord 210 338 344 10.1016/j.jad.2016.12.012 28088111
B.W. Smith et al. The brief resilience scale: Assessing the ability to bounce back Int. J. Behav. Med. 15 3 194 200 10.1080/10705500802222972 18696313
M.E. Hughes et al. A Short scale for measuring loneliness in large surveys: results from two population-based studies Res. Aging 26 6 655 672 10.1177/0164027504268574 18504506 2394670
Our World In Data. SARS-CoV-2 sequences by variant, Luxembourg. Accessed 31 Mar 2025; Available from: https://ourworldindata.org/grapher/covid-variants-bar?time=2023-01-16&country=~LUX (2025).
A.V. Ballering et al. Persistence of somatic symptoms after COVID-19 in the Netherlands: An observational cohort study Lancet 400 10350 452 461 10.1016/S0140-6736(22)01214-4 35934007 9352274
V. Fernández-Alonso et al. Resilience after COVID-19: A descriptive, cross-sectional study Clin. Nurs. Res. 32 3 618 628 10.1177/10547738231154326 36760005 9922667
M. Einav M. Margalit Loneliness before and after COVID-19: Sense of coherence and hope as coping mechanisms Int. J. Environ. Res. Public Health 20 10 5840 10.3390/ijerph20105840 37239566 10218178
M. Ohira et al. Post-acute sequelae of SARS-CoV-2 mimic: An important neurological condition J. Neurol. Sci. 10.1016/j.jns.2024.123199 39182422
Global Burden of Disease Long COVID Collaborators Estimated global proportions of individuals with persistent fatigue, cognitive, and respiratory symptom clusters following symptomatic COVID-19 in 2020 and 2021 JAMA 328 16 1604 1615 10.1001/jama.2022.18931 9552043
L.G. vom Steeg S.L. Klein SeXX matters in infectious disease pathogenesis PLoS Pathog. 12 2 e1005374 10.1371/journal.ppat.1005374
S.L. Klein K.L. Flanagan Sex differences in immune responses Nat. Rev. Immunol. 16 10 626 638 10.1038/nri.2016.90 27546235
M. Møller et al. Exploring the dynamics of COVID-19 in a Greenlandic cohort: Mild acute illness and moderate risk of long COVID IJID Reg. 11 100366 10.1016/j.ijregi.2024.100366 38736712 11081797
E. Gentilotti et al. Clinical phenotypes and quality of life to define post-COVID-19 syndrome: A cluster analysis of the multinational, prospective ORCHESTRA cohort EClinicalMedicine 62 102107 10.1016/j.eclinm.2023.102107 37654668 10466236
D. Ausserhofer et al. Relationship between depression, anxiety, stress, and SARS-CoV-2 infection: A longitudinal study Front. Psychol. 10.3389/fpsyg.2023.1116566 37213392 10197902
K. Kircanski et al. Investigating the nature of co-occurring depression and anxiety: Comparing diagnostic and dimensional research approaches J. Affect. Disord. 216 123 135 10.1016/j.jad.2016.08.006 27554605
V. Tsampasian et al. Risk factors associated with post−COVID-19 condition: A systematic review and meta-analysis JAMA Intern. Med. 183 6 566 580 10.1001/jamainternmed.2023.0750 36951832 10037203
G.S. Gilmour et al. Management of functional neurological disorder J. Neurol. 267 7 2164 2172 10.1007/s00415-020-09772-w 32193596 7320922
X. Zhang A.M. Brown D.C. Rhubart Can resilience buffer the effects of loneliness on mental distress among working-age adults in the United States during the COVID-19 pandemic? A latent moderated structural modeling analysis Int. J. Behav. Med. 30 6 790 800 10.1007/s12529-022-10151-0 36631701
N. Mahapatra et al. Resilience, loneliness, and anxiety during COVID-19 pandemic in the U.S J. Hum. Behav. Soc. Environ. 35 1 39 57 10.1080/10911359.2023.2293972
C. Pauly et al. The moderating role of resilience in the personality-mental health relationship during the COVID-19 pandemic Front. Psychiatry 10.3389/fpsyt.2021.745636 34744837 8566705
I. Londero N.S. da Rocha Personality dimensions, resilience, and depression during COVID-19 pandemic: A one-year longitudinal study Acta Physiol. 245 104229 10.1016/j.actpsy.2024.104229
W.D.S. Killgore et al. Loneliness: A signature mental health concern in the era of COVID-19 Psychiatry Res. 290 113117 10.1016/j.psychres.2020.113117 32480121 7255345
D.C. Oviedo et al. Resilience mediates the effect of the COVID-19 pandemic on mental health in a sample of adults in Panama Front. Psychol. 10.3389/fpsyg.2023.1235935 38034306 10687484
T. Ballouz et al. Recovery and symptom trajectories up to two years after SARS-CoV-2 infection: Population based, longitudinal cohort study BMJ 381 e074425 10.1136/bmj-2022-074425 37257891 10230608
S. Padilla et al. Long COVID across SARS-CoV-2 variants, lineages, and sublineages iScience 27 4 109536 2024iSci..27j9536P 10.1016/j.isci.2024.109536 38585665 10995878