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

      Merikanto, Ilona; Kortesoja, Laura; Benedict, Christian; Chung, Frances; Cedernaes, Jonathan; Espie, Colin A.; Morin, Charles M.; Dauvilliers, Yves; Partinen, Markku; Gennaro, Luigi De; Wing, Yun Kwok; Chan, Ngan Yin; Inoue, Yuichi; Matsui, Kentaro; Holzinger, Brigitte; Plazzi, Giuseppe; Mota-Rolim, Sérgio Arthuro; Leger, Damien; Penzel, Thomas; Bjorvatn, Bjørn (Journal article; Peer reviewed, 2022)
      Study Objectives Individual circadian type is a ubiquitous trait defining sleep, with eveningness often associated with poorer sleep and mental health than morningness. However, it is unknown whether COVID-19 pandemic has ...
    • How our Dreams Changed During the COVID-19 Pandemic: Effects and Correlates of Dream Recall Frequency - a Multinational Study on 19,355 Adults 

      Fränkl, Eirin; Scarpelli, Serena; Nadorff, Michael R.; Bjorvatn, Bjørn; Bolstad, Courtney J.; Chan, Ngan Yin; Chung, Frances; Dauvilliers, Yves; Espie, Colin A.; Inoue, Yuichi; Leger, Damien; Macedo, Taina; Matsui, Kentaro; Merikanto, Ilona; Morin, Charles M.; Mota-Rolim, Sérgio Arthuro; Partinen, Markku; Penzel, Thomas; Plazzi, Giuseppe; Sieminski, Mariusz; Wing, Yun Kwok; Gennaro, Luigi De; Holzinger, Brigitte (Journal article; Peer reviewed, 2021)
      Objective: Many have reported odd dreams during the pandemic. Given that dreams are associated with mental health, understanding these changes could provide crucial information about wellbeing during the pandemic. This ...
    • Social Jetlag Changes During the COVID-19 Pandemic as a Predictor of Insomnia – A MultiNational Survey Study 

      Brandão, Luiz Eduardo Mateus; Martikainen, Teemu; Merikanto, Ilona; Holzinger, Brigitte; Morin, Charles M.; Espie, Colin A.; Bolstad, Courtney J.; Leger, Damien; Chung, Frances; Plazzi, Giuseppe; Dauvilliers, Yves; Matsui, Kentaro; De Gennaro, Luigi; Sieminski, Mariusz; Nadorff, Michael R.; Chan, Ngan Yin; Wing, Yun Kwok; Mota-Rolim, Sérgio Arthuro; Inoue, Yuichi; Partinen, Markku; Benedict, Christian; Bjorvatn, Bjørn; Cedernaes, Jonathan (Journal article; Peer reviewed, 2021)
      Purpose: Lifestyle and work habits have been drastically altered by restrictions due to the COVID-19 pandemic. Whether the associated changes in sleep timing modulate the risk of suffering from symptoms of insomnia, the ...