medRxiv preprint doi: https://doi.org/10.1101/2020.11.11.20229708; this version posted November 13, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission. Mortality in Norway and Sweden before and after the Covid-19 outbreak: a cohort study Frederik E Juul, medical doctor1*; Henriette C Jodal, medical doctor1*; Ishita Barua, medical doctor1*; Erle Refsum, postdoctoral fellow1; Ørjan Olsvik, professor2; Lise M Helsingen, medical doctor1; Magnus Løberg, associate professor1; Michael Bretthauer, professor1#; Mette Kalager, professor1#; Louise Emilsson, associate professor1,3,4,5# *These authors have contributed equally #These authors have contributed equally 1Clinical Effectiveness Research Group, Oslo University Hospital and University of Oslo, Oslo, Norway 2Faculty of Health Sciences, UiT - The Arctic University of Norway, Tromso, Norway 3Department of General Practice, University of Oslo, Oslo, Norway 4Vårdcentralen Årjäng & Centre for Clinical Research, Värmland län, Sverige 5Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden Corresponding author: Frederik E Juul, MD Clinical Effectiveness Research Group University of Oslo Box 1089 Blindern, 0317 Oslo E-mail:
[email protected] PhoneNOTE: This: +47 preprint 975 reports 12 966 new research that has not been certified by peer review and should not be used to guide clinical practice. 1 medRxiv preprint doi: https://doi.org/10.1101/2020.11.11.20229708; this version posted November 13, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity.