Ingeborg Hess Elgersma
researcher
Contact
Send email {model.translations.sendEmailTo} IngeborgHess.Elgersma@fhi.no
Department
Responsibilities
Researcher in Centre for Epidemic Intervention Research (CEIR)
Effects of infectious disease control measures Randomized controlled trials Quasi-experimental design
Projects and publications
- Unni Gopinathan, Ingeborg Hess Elgersma, Therese Kristine Dalsbø, Mona Bjørbæk, Atle Fretheim, (2025). Strengthening research preparedness for crises: lessons from Norwegian government agencies in using randomized trials and quasi-experimental methods to evaluate public policy interventions. Health Research Policy and Systems doi: 10.1186/s12961-024-01271-y
- Runar Barstad Solberg, Atle Fretheim, Ingeborg Hess Elgersma, Mette Fagernes, Bjørn Gunnar Iversen, Lars G. Hemkens, Christopher James Rose, Petter Elstrøm, (2024). Personal protective effect of wearing surgical face masks in public spaces on self-reported respiratory symptoms in adults: pragmatic randomised superiority trial. The BMJ doi: 10.1136/bmj-2023-078918
- Ingeborg Hess Elgersma, Atle Fretheim, Petter Elstrøm, Preben Aavitsland, (2023). Association between Face mask use and Risk of SARS-CoV-2 Infection - Cross-sectional study. Epidemiology and Infection s. 1-5. doi: 10.1017/S0950268823001826
- Marit Tuv, Ingeborg Hess Elgersma, Ellen Furuseth, Christine Holst, Arnfinn Helleve, Atle Fretheim, (2023). GP phone calls to improve COVID-19 vaccine uptake among patients at increased risk of severe COVID-19: a randomised trial. British Journal of General Practice Open s. 1-8. doi: 10.3399/BJGPO.2022.0175
- Ingeborg Hess Elgersma, Rannveig Kaldager Hart, Melanie Lindsay Straiton, Lars Johan Hauge, Anne Reneflot, (2023). Migrant background and the impact of the COVID-19 pandemic on mental healthcare consultations among children and adolescents in Norway: a nationwide registry study. BMC Health Services Research s. 1-14. doi: 10.1186/s12913-023-09666-3
- Atle Fretheim, Ingeborg Hess Elgersma, Arnfinn Helleve, Petter Elstrøm, Oliver Kacelnik, Lars G. Hemkens, (2022). Effect of Wearing Glasses on Risk of Infection With SARS-CoV-2 in the Community: A Randomized Clinical Trial. JAMA Network Open doi: 10.1001/jamanetworkopen.2022.44495
- Kristian Bandlien Kraft, Ingeborg Hess Elgersma, Trude Marie Lyngstad, Petter Elstrøm, Kjetil Elias Telle, (2022). COVID-19 vaccination rates among healthcare workers by immigrant background: A nation-wide registry study from Norway. Scandinavian Journal of Public Health doi: 10.1177/14034948221100685
- Ingeborg Hess Elgersma, Elise Svarstad, Hilde Kløvstad, Karin Maria Nygård, Anja Bråthen Kristoffersen, (2022). No evidence for added value of introducing mandatory COVID-19 testing for international travellers entering Norway with a valid EU digital COVID certificate. Infectious Diseases s. 934-939. doi: 10.1080/23744235.2022.2131899
- Ingeborg Hess Elgersma, Kjetil Elias Telle, Petter Elstrøm, Håvard Mikal Skagseth, Oliver Kacelnik, (2022). Transmission of severe acute respiratory coronavirus virus 2 (SARS-CoV-2) between hospital workers and members of their household: Nationwide, registry-based, cohort study from Norway. Infection control and hospital epidemiology s. 1-6. doi: 10.1017/ice.2022.108
- Ingeborg Hess Elgersma, Atle Fretheim, Thor Indseth, Anita Thorolvsen Munch, Live Bøe Johannessen, Christine Engh Hansen, (2022). The Evaluation of a Social Media Campaign to Increase COVID-19 Testing in Migrant Groups: Cluster Randomized Trial. Journal of Medical Internet Research (JMIR) doi: 10.2196/34544
- Angela Susan Labberton, Anna Aasen Godøy, Ingeborg Hess Elgersma, Bjørn Heine Strand, Kjetil Elias Telle, Trude Margrete Arnesen, Karin Maria Nygård, Thor Indseth, (2022). SARS-CoV-2 infections and hospitalisations among immigrants in Norway-significance of occupation, household crowding, education, household income and medical risk: a nationwide register study. Scandinavian Journal of Public Health s. 772-781. doi: 10.1177/14034948221075029
- Atle Fretheim, Lars G. Hemkens, Arnfinn Helleve, Petter Elstrøm, Ingeborg Hess Elgersma, Oliver Kacelnik, (2022). The GLasses Against transmission of SARS-CoV-2 in the communitY (GLASSY) trial: A pragmatic randomized trial (study protocol). medRxiv doi: 10.1101/2022.02.04.22270120
- Atle Fretheim, Ingeborg Hess Elgersma, Fredrik Aaeng Kristiansen, Caroline Rømming Varmbo, Miriam Kristine Salame Olsbø, Iselin Havstein Strand Glover, Martin Flatø, (2021). The effectiveness of free face mask distribution on use of face masks. A cluster randomised trial in stovner district of oslo, Norway. International Journal of Environmental Research and Public Health (IJERPH) doi: 10.3390/ijerph18178971
- Kristin Hestmann Vinjerui, Ingeborg Hess Elgersma, Atle Fretheim, (2021). Increased COVID-19 testing rates following combined door-to-door and mobile testing facility campaigns in Oslo, Norway, a difference-in-difference analysis. International Journal of Environmental Research and Public Health (IJERPH) doi: 10.3390/ijerph182111078
- Mona Bjørbæk, Ingeborg Hess Elgersma, Cathinka Halle Julin, Petter Elstrøm, Signe Agnes Flottorp, Atle Fretheim, Christine Holst, Unni Gopinathan, Heather Eileen Menzies Munthe-Kaas, Andrew David Oxman, Matthew Prescott Oxman, Christopher James Rose, Sarah Ellen Rosenbaum, Runar Barstad Solberg, Tone Bruun, Arnfinn Helleve, Simon Arnold Lewin, Annlaug Selstø, (2024). Centre for Epidemic Interventions Research (CEIR) Annual Report 2023.
- Kristian Bandlien Kraft, Ingeborg Hess Elgersma, Angela Susan Labberton, Thor Indseth, Anna Aasen Godøy, (2021). Covid-19: Persons tested, confirmed cases and associated hospitalizations by education and income.
- Thor Indseth, Atle Fretheim, Rojan Tordhol Ezzati, Abdi Gele, Jan-Paul Brekke, Ingeborg Hess Elgersma, Anna Aasen Godøy, Lema Hussaini, Naima Said Sheikh, Gunnar Øyvind Isaksson Rø, Trude Margrete Arnesen, Mona Bjørbæk, Hodon Duahle, Solveig Engebretsen, Helena Niemi Eide, Julie Salvesen Fevåg, Martin Flatø, Mohamed Gawad, Maja Weemes Grøtting, Kjersti Helene Hernæs, Marte Karoline Råberg Kjøllesdal, Prabhjot Kour, Anja Bråthen Kristoffersen, Angela Susan Labberton, Anja Elsrud Schou Lindman, Fredrik Methi, Charlott Nordström, Samera Azeem Qureshi, Ragnhild Anne Caroline Storste Spilker, Bjørn Heine Strand, Selam Andegiorgis Tsige, Kristin Hestmann Vinjerui, Line Vold, Kjetil Elias Telle, (2021). Koronapandemien og innvandrerbefolkningene, vurderinger og erfaringer .
- Kristin Hestmann Vinjerui, Ingeborg Hess Elgersma, Atle Fretheim, (2021). Covid-19. Dør-til-dør-aksjoner, mobile teststasjoner og endring i testandel blant norsk- og utenlandsfødte i bydel Stovner, Oslo.
- Thor Indseth, Trude Margrete Arnesen, Mona Bjørbæk, Jan-Paul Brekke, Hodon Duahle, Ingeborg Hess Elgersma, Helena Niemi Eide, Rojan Tordhol Ezzati, Julie Salvesen Fevåg, Martin Flatø, Atle Fretheim, Mohamed Gawad, Abdi Ali Gele, Anna Aasen Godøy, Maja Weemes Grøtting, Kjersti Helene Hernæs, Lema Hussaini, Anja Bråthen Kristoffersen, Angela Susan Labberton, Anja Elsrud Schou Lindman, Naima Said Sheikh, Charlott Elise Gyllenhammar Nordstrøm, Samera Azeem Qureshi, Ragnhild Anne Caroline Storste Spilker, Bjørn Heine Strand, Kjetil Elias Telle, Selam Andegiorgis Tsige, Kristin Hestmann Vinjerui, (2021). Covid-19 blant innvandrere i Norge, vurdering av tiltak og erfaringer fra felt, delrapport 1.
- Ingeborg Hess Elgersma, Petter Elstrøm, Lars G. Hemkens, Arnfinn Helleve, Oliver Kacelnik, Atle Fretheim, (2024). Effect of wearing glasses for prevention of SARS-CoV-2 on visits to health care providers—additional results from a randomized controlled trial. Trials doi: 10.1186/s13063-024-08602-y
- Atle Fretheim, Petter Elstrøm, Cathinka Lønning Halle, Unni Gopinathan, Ingeborg Hess Elgersma, Runar Barstad Solberg, Arnfinn Helleve, (2024). Why were so few randomized trials of public health and social measures conducted during the COVID-19 pandemic? The Norwegian experience. Trials doi: 10.1186/s13063-024-08547-2