Evidence map›Paper›PMID 35115852›Full record

ArticleNature and science of sleep2022

Nightmares in People with COVID-19: Did Coronavirus Infect Our Dreams?

Serena Scarpelli, Michael R Nadorff, Bjørn Bjorvatn, Frances Chung, Yves Dauvilliers, Colin A Espie, Yuichi Inoue, Kentaro Matsui, Ilona Merikanto, Charles M Morin and 12 more

Open access · goldAbstract read
In one paragraph

Article in Nature and science of sleep, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 1 pooled it
4.7field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
  2. Lucid Dreaming: Not Just Awareness, but Agency.Journal of sleep research · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Neurological, psychological, psychosocial complications of long-COVID and their management.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Review
  20. Dreaming during the COVID-19 pandemic: A narrative review.Neuroscience and biobehavioral reviews · 2022
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

22 authors at 19 institutions in 13 countries.

Serena ScarpelliDepartment of Psychology, Sapienza University of Rome, Rome, Italy.ORCID 0000-0002-9260-7111
Michael R NadorffMississippi State University, Mississippi State, MS, USA.
Bjørn BjorvatnDepartment of Public Health and Primary Care, University of Bergen and Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway.ORCID 0000-0001-7051-745X
Frances ChungDepartment of Anesthesiology and Pain Medicine, University Health Network, University of Toronto, Toronto, Canada.
Yves DauvilliersSleep-Wake Disorders Unit, Department of Neurology, Gui-de-Chauliac Hospital, CHU Montpellier, INM, Univ Montpellier, INSERM, Montpellier, France.
Colin A EspieSleep and Circadian Neuroscience Institute, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Yuichi InoueTokyo Medical University, Tokyo, Japan.
Kentaro MatsuiDepartment of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Kodaira, Japan.
Ilona MerikantoSleepWell Research Program, Faculty of Medicine, University of Helsinki, Helsinki, Finland.ORCID 0000-0002-1222-6678
Charles M MorinÉcole de Psychologie, Centre d'étude des troubles du sommeil, Centre de recherche CERVO/Brain Research Center, Université Laval, Québec, Canada.
Thomas PenzelSleep Medicine Center, Charité Universitätsmedizin Berlin, Berlin, Germany.ORCID 0000-0002-4304-0112
Mariusz SieminskiDepartment of Emergency Medicine, Medical University of Gdansk, Gdansk, Poland.ORCID 0000-0001-8219-2912
Han FangDepartment of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, People's Republic of China.ORCID 0000-0002-0364-8457
Tainá MacêdoDepartment of Psychology, Federal University of Rio Grande do Norte, Natal, Brazil.ORCID 0000-0003-1474-4329
Sérgio A Mota-RolimBrain Institute, Physiology and Behavior Department, and Onofre Lopes University Hospital - Federal University of Rio Grande do Norte, Natal, Brazil.
Damien LegerUniversité de Paris, APHP, Hôtel-Dieu, Centre du Sommeil et de la Vigilance, Paris, France.ORCID 0000-0003-1168-480X
Giuseppe PlazziIRCCS, Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy.ORCID 0000-0002-1051-0472
Ngan Yin ChanLi Chiu Kong Family Sleep Assessment Unit, Department of Psychiatry, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong, Special Administrative Regions, People's Republic of China.
Markku PartinenHelsinki Sleep Clinic, Terveystalo Healthcare, and Department of Neurosciences, Clinicum, University of Helsinki, Helsinki, Finland.
Courtney J BolstadMississippi State University, Mississippi State, MS, USA.ORCID 0000-0003-2297-2778
Brigitte HolzingerInstitute for Consciousness and Dream Research, Vienna, Austria.ORCID 0000-0001-5385-4091
Luigi De GennaroDepartment of Psychology, Sapienza University of Rome, Rome, Italy.ORCID 0000-0003-3613-6631
Universidade Federal do Rio Grande do Norte · BRUniversity of Helsinki · FIBaylor College of Medicine · USCharité - Universitätsmedizin Berlin · DEChinese University of Hong Kong · HKFondazione Santa Lucia · ITGdańsk Medical University · PLHaukeland University Hospital · NOInserm · FRMississippi State University · USNational Center of Neurology and Psychiatry · JPPeking University · CNSapienza University of Rome · ITTokyo Medical University · JPUniversité Laval · CAUniversité Paris Cité · FRUniversity Health Network · CAUniversity of Modena and Reggio Emilia · ITUniversity of Oxford · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionA growing number of studies have demonstrated that the coronavirus disease-19 (COVID-19) pandemic has severely affected sleep and dream activity in healthy people. To date, no investigation has examined dream activity specifically in COVID-19 patients.

methodsAs part of the International COVID-19 Sleep Study (ICOSS), we compared 544 COVID-19 participants with 544 matched-controls. A within-subjects comparison between pre-pandemic and pandemic periods computed separately for controls and COVID-19 participants were performed on dream recall and nightmare frequency (DRF; NF). Also, non-parametric comparisons between controls and COVID-19 participants were carried out. Further, we compared psychological measures between the groups collected during pandemic. Ordinal logistic regression to detect the best predictors of NF was performed.

resultsWe found that people reported greater dream activity during the pandemic. Comparisons between controls and COVID-19 participants revealed a) no difference between groups concerning DRF in the pre-pandemic period and during the pandemic; b) no difference between groups concerning nightmare frequency in the pre-pandemic period; and c) COVID-19 participants reported significantly higher NF than controls during pandemic (p = 0.003). Additionally, we showed that a) anxiety, depression, post-traumatic stress-disorder (PTSD) symptom scores were higher in COVID-19 participants than controls; and b) quality of life and health as well as wellbeing (WHO-5) scores were significantly higher in controls than COVID-19 participants. Finally, ordinal logistic regression indicates that DRF (p < 0.001), PTSD (p < 0.001), anxiety (p = 0.018), insomnia (p = 0.039), COVID-19 severity (p = 0.014), sleep duration (p = 0.003) and age (p = 0.001) predicted NF. DISCUSSION: Our work shows strong associations between increased nightmares in those reporting having had COVID-19. This suggests that the more that people were affected by COVID-19, the greater the impact upon dream activity and quality of life.

Indexed as

anxietyCOVID-19 severitydreamingpandemicPTSDsleep

Identifiers

PMID35115852
PMCPMC8800372
OpenAlexW4206903567

What OpenQuestion holds

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.