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This review aims to: (1) map the studies providing information about factors associated with sleep characteristics in HCWs working in the context of the COVID-19 pandemic during the first and second waves and (2) examine the state of the evidence base in terms of the availability of information on the influence of atypical work schedules. A literature search was performed in PubMed. Studies containing information about factors (demographic; psychological; occupational; COVID-19-specific; work schedule; lifestyle; medical; or other) associated with various sleep characteristics among HCWs working in the context of the COVID-19 pandemic were included. Particular attention was paid to the availability of information on the role of atypical work schedules on HCW sleep. Fifty-seven articles met the inclusion criteria. Most studies were reports of quantitative cross-sectional surveys using self-report measures. Associations between female sex, frontline HCW status, psychological factors, and poorer sleep were observed. Six studies included a measure of shift work in their analyses, 5 of which reported an association between shift work status and sleep. A wide range of factors were investigated, with female sex, frontline HCW status, and psychological factors repeatedly demonstrating associations with poorer sleep. Sleep was predominantly measured in terms of self-reported sleep quality or insomnia symptoms. Few studies investigated the influence of atypical work schedules on HCW sleep in the context of the COVID-19 pandemic. Research on this topic is lacking in terms of reliable and consistent measurements of sleep outcomes, longitudinal data, and knowledge about the influence of covariates such atypical work schedules, comorbidity, and medical history on HCW sleep.<\/jats:p>","DOI":"10.1177\/07487304221103376","type":"journal-article","created":{"date-parts":[[2022,7,1]],"date-time":"2022-07-01T00:54:26Z","timestamp":1656636866000},"page":"358-384","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":10,"title":["Sleep of Healthcare Workers During the COVID-19 Pandemic and the Role of Atypical Work Schedules: A Scoping Review"],"prefix":"10.1177","volume":"37","author":[{"given":"Niamh","family":"Power","sequence":"first","affiliation":[{"name":"Douglas Mental Health University Institute, Montreal, QC, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michel","family":"Perreault","sequence":"additional","affiliation":[{"name":"Douglas Mental Health University Institute, Montreal, QC, Canada"},{"name":"Department of Psychiatry, McGill University, Montreal QC, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manuela","family":"Ferrari","sequence":"additional","affiliation":[{"name":"Douglas Mental Health University Institute, Montreal, QC, Canada"},{"name":"Department of Psychiatry, McGill University, Montreal QC, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9367-2919","authenticated-orcid":false,"given":"Philippe","family":"Boudreau","sequence":"additional","affiliation":[{"name":"Douglas Mental Health University Institute, Montreal, QC, Canada"},{"name":"Department of Psychiatry, McGill University, Montreal QC, Canada"},{"name":"Centre for Study and Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Montreal, QC, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3896-2710","authenticated-orcid":false,"given":"Diane B.","family":"Boivin","sequence":"additional","affiliation":[{"name":"Douglas Mental Health University Institute, Montreal, QC, Canada"},{"name":"Department of Psychiatry, McGill University, Montreal QC, Canada"},{"name":"Centre for Study and Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Montreal, QC, Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2022,6,30]]},"reference":[{"key":"bibr1-07487304221103376","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph18178970"},{"key":"bibr2-07487304221103376","first-page":"e12948","volume":"13","author":"Abdellah MM","year":"2021","journal-title":"Cureus"},{"key":"bibr3-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijnurstu.2012.07.003"},{"key":"bibr4-07487304221103376","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyt.2020.619540"},{"key":"bibr5-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1016\/j.jad.2020.09.080"},{"key":"bibr6-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1080\/1364557032000119616"},{"key":"bibr7-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1111\/ppc.12927"},{"key":"bibr8-07487304221103376","doi-asserted-by":"publisher","DOI":"10.3233\/WOR-2011-1267"},{"key":"bibr9-07487304221103376","doi-asserted-by":"publisher","DOI":"10.12688\/f1000research.27189.2"},{"key":"bibr10-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1016\/j.sleep.2021.07.021"},{"key":"bibr11-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1186\/s13293-020-00333-4"},{"key":"bibr12-07487304221103376","doi-asserted-by":"publisher","DOI":"10.1016\/j.patbio.2014.08.001"},{"key":"bibr13-07487304221103376","doi-asserted-by":"publisher","DOI":"10.3109\/07420528.2012.675257"},{"key":"bibr14-07487304221103376","unstructured":"Boniol M, McIsaac M, Xu L, Wuliji T, Diallo K, Campbell J (2019) Gender equity in the health workforce: analysis of 104 countries. 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