Selected publications.

Published articles within ICOSS project:


Persistent short nighttime sleep duration is associated with a greater post-COVID risk in fully mRNA-vaccinated individuals.

Xue P, Merikanto I, Chung F, Morin CM, Espie C, Bjorvatn B, Cedernaes J, Landtblom AM, Penzel T, De Gennaro L, Holzinger B, Matsui K, Hrubos-Strøm H, Korman M, Leger D, Mota-Rolim S, Bolstad CJ, Nadorff M, Plazzi G, Reis C, Chan RNY, Wing YK, Yordanova J, Bjelajac AK, Inoue Y, Partinen M, Dauvilliers Y, Benedict C. Transl Psychiatry. 2023 Feb 1;13(1):32. doi: 10.1038/s41398-023-02334-4.


Sleep symptoms are essential features of long-COVID - Comparing healthy controls with COVID-19 cases of different severity in the international COVID sleep study (ICOSS-II).

Merikanto I, Dauvilliers Y, Chung F, Wing YK, de Gennaro L, Holzinger B, Bjorvatn B, Morin CM, Penzel T, Benedict C, Koscec Bjelajac A, Chan NY, Espie CA, Hrubos-Strøm H, Inoue Y, Korman M, Landtblom AM, Léger D, Matsui K, Mota-Rolim S, Nadorff MR, Plazzi G, Reis C, Yordanova J, Partinen M. J Sleep Res. 2022 Oct 8:e13754. doi: 10.1111/jsr.13754.


Shift workers are at increased risk of severe COVID-19 compared with day workers: Results from the international COVID sleep study (ICOSS) of 7141 workers.

Bjorvatn B, Merikanto I, Reis C, Korman M, Bjelajac AK, Holzinger B, De Gennaro L, Wing YK, Morin CM, Espie CA, Benedict C, Landtblom AM, Matsui K, Hrubos-Strøm H, Mota-Rolim S, Nadorff MR, Plazzi G, Chan RNY, Partinen M, Dauvilliers Y, Chung F, Forthun I. Chronobiol Int. 2022 Nov 22:1-9. doi: 10.1080/07420528.2022.2148182.


The role of sleep and dreams in long-COVID.

Scarpelli S, De Santis A, Alfonsi V, Gorgoni M, Morin CM, Espie C, Merikanto I, Chung F, Penzel T, Bjorvatn B, Dauvilliers Y, Holzinger B, Wing YK, Partinen M, Plazzi G, De Gennaro L. J Sleep Res. 2022 Nov 18:e13789. doi: 10.1111/jsr.13789.


Has the COVID-19 Pandemic Traumatized Us Collectively? The Impact of the COVID-19 Pandemic on Mental Health and Sleep Factors via Traumatization: A Multinational Survey.

Holzinger B, Nierwetberg F, Chung F, Bolstad CJ, Bjorvatn B, Chan NY, Dauvilliers Y, Espie CA, Han F, Inoue Y, Leger D, Macêdo T, Matsui K, Merikanto I, Morin CM, Mota-Rolim SA, Partinen M, Plazzi G, Penzel T, Sieminski M, Wing YK, Scarpelli S, Nadorff MR, De Gennaro L. Nat Sci Sleep. 2022;14:1469-1483.


Dream-enactment behaviours during the COVID-19 pandemic: an international COVID-19 sleep study.

Liu Y, Partinen E, Chan NY, Dauvilliers Y, Inoue Y, De Gennaro L, Plazzi G, Bolstad CJ, Nadorff MR, Merikanto I, Bjorvatn B, Han F, Zhang B, Cunha AS, Mota-Rolim S, Léger D, Matsui K, Espie CA, Chung F, Morin CM, Sieminski M, Thomas P, Holzinger B, Partinen M, Wing YK. J Sleep Res. 2022 Apr 26. doi: 10.1111/jsr.13613.


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

Scarpelli S, Nadorff MR, Bjorvatn B, Chung F, Dauvilliers Y, Espie CA, Inoue Y, Matsui K, Merikanto I, Morin CM, Penzel T, Sieminski M, Fang H, Macêdo T, Mota-Rolim SA, Leger D, Plazzi G, Chan NY, Partinen M, Bolstad CJ, Holzinger B, De Gennaro L. Nat Sci Sleep. 2022;14:93-108.


Disturbances in sleep, circadian rhythms and daytime functioning in relation to coronavirus infection and Long-COVID - A multinational ICOSS study

Merikanto, I., Dauvilliers, Y., Chung, F., Holzinger, B., De Gennaro, L., Wing, Y. K., Korman, M., Partinen, M. & 2nd ICOSS Members, 28 Dec 2021, (E-pub ahead of print) In: Journal of Sleep Research. 9 p., 13542.v doi: 10.1111/jsr.13542.


Sleep and daytime problems during the COVID-19 pandemic and effects of coronavirus infection, confinement and financial suffering: a multinational survey using a harmonised questionnaire

Partinen, M., Holzinger, B., Morin, C. M., Espie, C., Chung, F., Penzel, T., Benedict, C., Bolstad, C. J., Cedernaes, J., Chan, R. N. Y., Dauvilliers, Y., De Gennaro, L., Han, F., Inoue, Y., Matsui, K., Leger, D., Cunha, A. S., Merikanto, I., Mota-Rolim, S., Nadorff, M. & 5 others, , Dec 2021, In: BMJ Open. 11, 12, 10 p., 050672. doi: 10.1136/bmjopen-2021-050672.


Social Jetlag Changes During the COVID-19 Pandemic as a Predictor of Insomnia - A Multi-National Survey Study

Brandao, L. E. M., Martikainen, T., Merikanto, I., Holzinger, B., Morin, C. M., Espie, C. A., Bolstad, C., Leger, D., Chung, F., Plazzi, G., Dauvilliers, Y., Matsui, K., De Gennaro, L., Sieminski, M., Nadorff, M. R., Chan, N. Y., Wing, Y. K., Mota-Rolim, S. A., Inoue, Y., Partinen, M. & 3 others, , 2021, In: Nature and Science of Sleep. 13, p. 1711-1722 12 p. doi: 10.2147/NSS.S327365.


How our Dreams Changed During the COVID-19 Pandemic: Effects and Correlates of Dream Recall Frequency - a Multinational Study on 19,355 Adults

Fränkl, E., Scarpelli, S., Nadorff, M. R., Bjorvatn, B., Bolstad, C. J., Chan, N. Y., Chung, F., Dauvilliers, Y., Espie, C. A., Inoue, Y., Leger, D., Macêdo, T., Matsui, K., Merikanto, I., Morin, C. M., Mota-Rolim, S., Partinen, M., Penzel, T., Plazzi, G., Sieminski, M. & 3 others, , 22 Sep 2021, In: Nature and Science of Sleep. 13, p. 1573-1591.


Evening-types show highest increase of sleep and mental health problems during the COVID-19 pandemic - Multinational study on 19,267 adults

Ilona Merikanto, Markku Partinen, Laura Kortesoja, Christian Benedict, Frances Chung, Jonathan Cedernaes, Colin A. Espie, Charles M. Morin, Yves Dauvilliers, Luigi De Gennaro, Yun Kwok Wing, Ngan Yin Chan, Yuichi Inoue, Kentaro Matsui, Brigitte Holzinger, Giuseppe Plazzi, Sérgio Arthuro Mota-Rolim, Damien Leger, Thomas Penzel, Bjorn Bjorvatn. Sleep. 2021 Aug 25.


Insomnia, anxiety, and depression during the COVID-19 pandemic: an international collaborative study.

Charles M. Morin, Bjorn Bjorvatn, Frances Chung, Brigitte Holzinger, Markku Partinen, Thomas Penzel, Hans Ivers, Yun Kwok Wing, Ngan Yin Chan, Ilona Merikanto, Sergio Mota-Rolim, Tainá Macêdo , Luigi De Gennaro, Damien Leger, Yves Dauvilliers, Giuseppe Plazzi, Michael R. Nadorff, Courtney Bolstad , Mariusz Sieminski, Christian Benedict, Jonathan Cedernaes, Yuichi Inoue, Fang Han, Colin A. Espie. In: Sleep Medicine. 10.1016/j.sleep.2021.07.035


The association between high risk of sleep apnea, comorbidities, and risk of COVID-19: a population-based international harmonized study.

Chung F, Waseem R, Pham C, Penzel T, Han F, Bjorvatn B, Morin CM, Holzinger B, Espie CA, Benedict C, Cedernaes J, Saaresranta T, Wing YK, Nadorff MR, Dauvilliers Y, De Gennaro L, Plazzi G, Merikanto I, Matsui K, Leger D, Sieminski M, Mota-Rolim S, Inoue Y, Partinen M; International COVID Sleep Study (ICOSS) group. Int COVID Sleep Study, 28 Apr 2021, In : Sleep and Breathing. 12 p.


Meal and Sleep Timing before and during the COVID-19 Pandemic: A Cross-Sectional Anonymous Survey Study from Sweden

Benedict, C., Brandao, L. E., Merikanto, I., Partinen, M., Bjorvatn, B. & Cedernaes, J., 22 Apr 2021, In : Clocks & sleep. 3, p. 25-258.


Sleep and circadian problems during the coronavirus disease 2019 (COVID-19) pandemic: the International COVID-19 Sleep Study (ICOSS)

ICOSS-Collaboration Grp, Partinen, M., Bjorvatn, B., Holzinger, B., Chung, F., Penzel, T., Espie, C. A. & Morin, C. M., 2021, In : Journal of Sleep Research. 30, 1, 8 p., 13206.


Sleep research in 2020: COVID-19-related sleep disorders

Partinen, M., Jan 2021, In : Lancet Neurology. 20, 1, p. 15-17 4 p.