{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T17:36:44Z","timestamp":1791999404652,"version":"4.4.0"},"reference-count":25,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2025,4,22]],"date-time":"2025-04-22T00:00:00Z","timestamp":1745280000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Sleep Research"],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>To study the impact of the COVID\u201019 pandemic on sleep and circadian rhythms\u2014two fundamental pillars for health\u2014the collaboration International COVID\u201019 Sleep Study (ICOSS) was established. The present overview comprehensively discusses the findings from this collaboration. Involving sleep researchers across the globe, ICOSS used a harmonised questionnaire to cover changes in sleep and sleep disorders, as well as physical and mental health. Two survey waves were conducted, one in 2020 and another one in 2021. In ICOSS\u20101, a total of 26,539 people from 14 countries across four continents (Europe, Asia, North and South America) participated. In ICOSS\u20102, two more countries joined ICOSS, and 15,813 people participated. The focus in ICOSS\u20102 was on Long COVID. Participants accessed the widely disseminated online surveys in their native language. In the 20 papers published so far, the surveys have uncovered several novel findings, including how the pandemic impacted sleep patterns, the prevalence of sleep disorders, chronotype\u2010based differences and sleep\u2010immune system interactions. To the best of our knowledge, there is no other large\u2010scale multinational study targeting the general population investigating the role of sleep and sleep disorders alongside a variety of psychological, biological, social and economic factors during the recent COVID\u201019 pandemic.<\/jats:p>","DOI":"10.1111\/jsr.70076","type":"journal-article","created":{"date-parts":[[2025,4,22]],"date-time":"2025-04-22T03:48:47Z","timestamp":1745293727000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Sleep During Pandemic Times: Summary of Findings and Future Outlook Through the Lens of the International\n                    <scp>COVID<\/scp>\n                    Sleep Study (\n                    <scp>ICOSS<\/scp>\n                    )"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7051-745X","authenticated-orcid":false,"given":"Bj\u00f8rn","family":"Bjorvatn","sequence":"first","affiliation":[{"name":"Department of Global Public Health and Primary Care University of Bergen, Bergen, Norway and Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital  Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1222-6678","authenticated-orcid":false,"given":"Ilona","family":"Merikanto","sequence":"additional","affiliation":[{"name":"SleepWell Research Program, Faculty of Medicine University of Helsinki, Helsinki, Finland and Orton Orthopaedics Hospital  Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frances","family":"Chung","sequence":"additional","affiliation":[{"name":"Department of Anesthesia and Pain Management Toronto Western Hospital, University Health Network, University of Toronto  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brigitte","family":"Holzinger","sequence":"additional","affiliation":[{"name":"Institute for Consciousness and Dream Research, Medical University of Vienna, Wien, Postgraduate, Sleep Coaching  Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8649-8895","authenticated-orcid":false,"given":"Charles M.","family":"Morin","sequence":"additional","affiliation":[{"name":"Centre de Recherche CERVO\/Brain Research Center, \u00c9cole de Psychologie Universit\u00e9 Laval  Quebec City Quebec Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4304-0112","authenticated-orcid":false,"given":"Thomas","family":"Penzel","sequence":"additional","affiliation":[{"name":"Interdisciplinary Sleep Medicine Center Charite Universit\u00e4tsmedizin Berlin  Berlin 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Psychiatry, Faculty of Medicine The Chinese University of Hong Kong  Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8911-4068","authenticated-orcid":false,"given":"Christian","family":"Benedict","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Biosciences Uppsala University  Uppsala Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pei","family":"Xue","sequence":"additional","affiliation":[{"name":"Department of Pharmaceutical Biosciences Uppsala University  Uppsala Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6585-3993","authenticated-orcid":false,"given":"Catia","family":"Reis","sequence":"additional","affiliation":[{"name":"Universidade Cat\u00f3lica Portuguesa, Cat\u00f3lica Research Centre for Psychological, Family and Social Wellbeing, Lisbon, Portugal and ISAM, Faculdade de Medicina de Lisboa  Lisbon 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