Published on in Vol 23, No 2 (2021): February

Preprints (earlier versions) of this paper are available at, first published .
Estimated Sleep Duration Before and During the COVID-19 Pandemic in Major Metropolitan Areas on Different Continents: Observational Study of Smartphone App Data

Estimated Sleep Duration Before and During the COVID-19 Pandemic in Major Metropolitan Areas on Different Continents: Observational Study of Smartphone App Data

Estimated Sleep Duration Before and During the COVID-19 Pandemic in Major Metropolitan Areas on Different Continents: Observational Study of Smartphone App Data


  1. Florea C, Topalidis P, Hauser T, Angerer M, Kurapov A, Beltran Leon C, Soares Brandão D, Schabus M. Sleep during COVID-19 lockdown: A cross-cultural study investigating job system relevance. Biochemical Pharmacology 2021;191:114463 View
  2. Macfarlane G, Hollick R, Morton L, Heddle M, Bachmair E, Anderson R, Whibley D, Keenan K, Murchie P, Stelfox K, Beasley M, Jones G. The effect of COVID-19 public health restrictions on the health of people with musculoskeletal conditions and symptoms: the CONTAIN study. Rheumatology 2021;60(SI):SI13 View
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  4. Epstein L, Cai A, Klerman E, Czeisler C. Resolving delayed sleep-wake phase disorder with a pandemic: two case reports. Journal of Clinical Sleep Medicine 2022;18(1):315 View
  5. Rijo-Ferreira F, Takahashi J. Circadian rhythms in infectious diseases and symbiosis. Seminars in Cell & Developmental Biology 2022;126:37 View
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  7. Batool-Anwar S, Robbins R, Ali S, Capasso A, Foreman J, Jones A, Tozan Y, DiClemente R, Quan S. Examining Changes in Sleep Duration Associated with the Onset of the COVID-19 Pandemic: Who is Sleeping and Who is Not?. Behavioral Medicine 2023;49(2):162 View
  8. Czeisler M, Capodilupo E, Weaver M, Czeisler C, Howard M, Rajaratnam S. Prior sleep-wake behaviors are associated with mental health outcomes during the COVID-19 pandemic among adult users of a wearable device in the United States. Sleep Health 2022;8(3):311 View
  9. Donzella S, Kohler L, Crane T, Jacobs E, Ernst K, Bell M, Catalfamo C, Begay R, Pogreba-Brown K, Farland L. COVID-19 Infection, the COVID-19 Pandemic, and Changes in Sleep. Frontiers in Public Health 2022;9 View
  10. YOUSEFİRAD N, SEZER F, PEHLİVAN M, ÖZYÜREK F, BAKIRHAN H, ÖZKAYA V, ALPAT İ, DİŞLİTAŞ SAMUR H, ERSOY G. Lifestyle Behaviour Changes and Adherence to the Mediterranean Diet during the COVID-19 Pandemic: A Cross-Sectional Study from Turkey. Fenerbahçe Üniversitesi Sağlık Bilimleri Dergisi 2022;2(3):624 View
  11. Bethea T, Zhai W, Zhou X, Ahles T, Ahn J, Cohen H, Dilawari A, Graham D, Jim H, McDonald B, Nakamura Z, Patel S, Rentscher K, Root J, Saykin A, Small B, Van Dyk K, Mandelblatt J, Carroll J. Associations between longitudinal changes in sleep disturbance and depressive and anxiety symptoms during theCOVID‐19 virus pandemic among older women with and without breast cancer in the thinking and living with breast cancer study. Cancer Medicine 2022;11(17):3352 View
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  14. Lan A, Kotler D, Kronfeld-Schor N, Stukalin Y, Einat H. Changes in sleep patterns of college students in Israel during COVID-19 lockdown, a sleep diaries study. Sleep and Biological Rhythms 2022;20(2):309 View
  15. Shneor E, Doron R, Levine J, Zimmerman D, Benoit J, Ostrin L, Gordon-Shaag A. Objective Behavioral Measures in Children before, during, and after the COVID-19 Lockdown in Israel. International Journal of Environmental Research and Public Health 2021;18(16):8732 View
  16. Massar S, Ng A, Soon C, Ong J, Chua X, Chee N, Lee T, Chee M. Reopening after lockdown: the influence of working-from-home and digital device use on sleep, physical activity, and wellbeing following COVID-19 lockdown and reopening. Sleep 2022;45(1) View
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  21. Kholghi M, Ellender C, Zhang Q, Gao Y, Higgins L, Karunanithi M. Home-Based Sleep Sensor Measurements in an Older Australian Population: Before and during a Pandemic. Sensors 2021;21(18):5993 View
  22. Delpino F, Caputo E, Arcêncio R, Cassuriaga J, Huckembeck C, Nunes B, Rombaldi A, Reichert F, da Silva M, Feter N. Association of Sleep Duration and Use of Sleeping Medication with Multimorbidity in Adults: Results from the PAMPA (Brazil) Cohort Study. Sleep Science 2023;16(01):068 View
  23. Massar S, Ong J, Lau T, Ng B, Chan L, Koek D, Cheong K, Chee M. Working-from-home persistently influences sleep and physical activity 2 years after the Covid-19 pandemic onset: a longitudinal sleep tracker and electronic diary-based study. Frontiers in Psychology 2023;14 View
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  25. Tufik S, Pires G, Porcacchia A, Bezerra A, Andersen M, Tufik S. Impact of the early months of the COVID-19 pandemic on the sleep patterns of a Brazilian population sample. Chronobiology International 2023;40(8):1133 View
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Books/Policy Documents

  1. Chinoy E, Markwald R. Encyclopedia of Sleep and Circadian Rhythms. View
  2. Moses J, Adibi S. The Science behind the COVID Pandemic and Healthcare Technology Solutions. View
  3. Massar S, Ong J, Chee M. COVID-19 and Sleep: A Global Outlook. View
  4. Salfi F, Ferrara M. COVID-19 and Sleep: A Global Outlook. View