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M. Kalager · SciRah

Researcher profile · Semantic Scholar

M. Kalager

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M. Kalager — researcher profile on SciRah

h-index: 40
Works: 204
Citations: 8,080

Most-cited papers

Effect of Colonoscopy Screening on Risks of Colorectal Cancer and Related Death.
M. Bretthauer, M. Løberg, P. Wieszczy, M. Kalager +17 more
2022New England Journal of Medicine602 citations Open access
Semantic Scholar
Post-polypectomy colonoscopy surveillance: European Society of Gastrointestinal Endoscopy (ESGE) Guideline – Update 2020
C. Hassan, G. Antonelli, J. Dumonceau, J. Reguła +17 more
2020Endoscopy460 citations Open access
Semantic Scholar
Endoscopist deskilling risk after exposure to artificial intelligence in colonoscopy: a multicentre, observational study.
K. Budzyń, Marcin Romańczyk, Diana Kitala, P. Kołodziej +17 more
2025The Lancet Gastroenterology and Hepatology234 citations
Semantic Scholar
Artificial intelligence for polyp detection during colonoscopy: a systematic review and meta-analysis
I. Barua, D. Vinsard, Henriette C. Jodal, M. Løberg +5 more
2020Endoscopy224 citations Open access
Semantic Scholar
Colorectal Cancer Incidence and Mortality After Removal of Adenomas During Screening Colonoscopies.
P. Wieszczy, M. Kaminski, Robert Franczyk, M. Løberg +11 more
2020Gastroenterology151 citations
Semantic Scholar
Estimated Lifetime Gained With Cancer Screening Tests: A Meta-Analysis of Randomized Clinical Trials.
M. Bretthauer, P. Wieszczy, M. Løberg, M. Kaminski +6 more
2023JAMA Internal Medicine120 citations Open access
Semantic Scholar
Real-Time Artificial Intelligence-Based Optical Diagnosis of Neoplastic Polyps during Colonoscopy.
I. Barua, P. Wieszczy, S. Kudo, M. Misawa +30 more
2022NEJM Evidence99 citations
Semantic Scholar
The COVID-19 pandemic in Norway and Sweden – threats, trust, and impact on daily life: a comparative survey
L. Helsingen, E. Refsum, Dagrun Kyte Gjøstein, M. Løberg +3 more
2020BMC Public Health91 citations Open access
Semantic Scholar
Colorectal Cancer Screening - Approach, Evidence, and Future Directions.
L. Helsingen, M. Kalager
2022NEJM Evidence82 citations
Semantic Scholar
Impact of artificial intelligence on colonoscopy surveillance after polyp removal: A pooled analysis of randomized trials.
Y. Mori, Pu Wang, M. Løberg, M. Misawa +22 more
2022Clinical Gastroenterology and Hepatology48 citations Open access
Semantic Scholar
Inflammatory bowel disease and risk of adenocarcinoma and neuroendocrine tumors in the small bowel.
J. Yu, E. Refsum, V. Perrin, L. Helsingen +7 more
2022Annals of Oncology43 citations Open access
Semantic Scholar
Computer aided detection and diagnosis of polyps in adult patients undergoing colonoscopy: a living clinical practice guideline
F. Foroutan, P. Vandvik, L. Helsingen, M. Kalager +22 more
2025British medical journal42 citations Open access
Semantic Scholar
Adenoma Detection Rates by Physicians and Subsequent Colorectal Cancer Risk.
N. Pilonis, Piotr Spychalski, M. Kalager, M. Løberg +8 more
2024Journal of the American Medical Association (JAMA)40 citations Open access
Semantic Scholar
Colonoscopist Performance and Colorectal Cancer Risk after Adenoma Removal to Stratify Surveillance: two nationwide observational studies.
P. Wieszczy, E. Waldmann, M. Løberg, J. Reguła +7 more
2020Gastroenterology39 citations Open access
Semantic Scholar
Effectiveness of Colonoscopy Screening vs Sigmoidoscopy Screening in Colorectal Cancer
F. Juul, A. Cross, Robert E. Schoen, C. Senore +13 more
2024JAMA Network Open38 citations Open access
Semantic Scholar
Towards a cancer mission in Horizon Europe: recommendations
A. Berns, U. Ringborg, J. Celis, M. Heitor +37 more
2020Molecular Oncology38 citations Open access
Semantic Scholar
Incomplete endoscopic resection of colorectal polyps: a prospective quality assurance study
I. B. Pedersen, M. Bretthauer, M. Kalager, M. Løberg +9 more
2020Endoscopy34 citations Open access
Semantic Scholar
Mortality in Norway and Sweden during the COVID-19 pandemic
F. Juul, Henriette C. Jodal, I. Barua, E. Refsum +6 more
2021Scandinavian Journal of Public Health32 citations Open access
Semantic Scholar
15-Year Benefits of Sigmoidoscopy Screening on Colorectal Cancer Incidence and Mortality
F. Juul, A. Cross, R. Schoen, C. Senore +13 more
2022Annals of Internal Medicine29 citations Open access
Semantic Scholar
Improving cancer screening programs
M. Kalager, M. Bretthauer
2020Science27 citations
Semantic Scholar
Benefits, burden, and harms of computer aided polyp detection with artificial intelligence in colorectal cancer screening: microsimulation modelling study
Natalie Halvorsen, C. Hassan, L. Correale, N. Pilonis +10 more
2025BMJ Medicine25 citations Open access
Semantic Scholar
Hopes and hypes for artificial intelligence in colorectal cancer screening.
Y. Mori, M. Bretthauer, M. Kalager
2021Gastroenterology24 citations Open access
Semantic Scholar
Risk of hepato‐pancreato‐biliary cancer is increased by primary sclerosing cholangitis in patients with inflammatory bowel disease: A population‐based cohort study
Jingru Yu, E. Refsum, L. Helsingen, T. Folseraas +11 more
2022United European Gastroenterology journal23 citations Open access
Semantic Scholar
Cancer outcomes research—a European challenge: measures of the cancer burden
M. Kalager, H. Adami, P. Lagergren, K. Steindorf +1 more
2021Molecular Oncology23 citations Open access
Semantic Scholar
Complete Polyp Resection with Cold versus Hot snare Polypectomy for Polyps sized 4-9 mm: A randomized controlled trial
I. B. Pedersen, Anna Rawa-Gołębiewska, Audrey H. Calderwood, L. Brix +13 more
2022Endoscopy21 citations Open access
Semantic Scholar
Quality‐of‐life effects of screening mammography in Norway
P. Zahl, M. Kalager, P. Suhrke, E. Nord
2020International Journal of Cancer21 citations Open access
Semantic Scholar
Principles for evaluation of surveillance after removal of colorectal polyps. Recommendations from the World Endoscopy Organization.
M. Rutter, M. Bretthauer, C. Hassan, R. Jover +16 more
2020Gastroenterology19 citations Open access
Semantic Scholar
Fecal Microbiota Transplantation Versus Vancomycin for Primary Clostridioides difficile Infection : A Randomized Controlled Trial.
Frederik Emil Juul, Michael Bretthauer, P. H. Johnsen, Faye Samy +25 more
2025Annals of Internal Medicine18 citations
Semantic Scholar
The Future of Cancer Screening-Guided Without Conflicts of Interest.
H. Adami, M. Kalager, M. Bretthauer
2023JAMA Internal Medicine18 citations
Semantic Scholar
Speedometer for withdrawal time monitoring during colonoscopy: a clinical implementation trial
I. Barua, M. Misawa, Jeremy R. Glissen Brown, T. Walradt +15 more
2022Scandinavian Journal of Gastroenterology18 citations Open access
Semantic Scholar
Estimation of overdiagnosis in colorectal cancer screening with sigmoidoscopy and faecal occult blood testing: comparison of simulation models
P. Wieszczy, M. Kaminski, M. Løberg, M. Bugajski +2 more
2021BMJ Open18 citations Open access
Semantic Scholar
Negative controls to detect uncontrolled confounding in observational studies of mammographic screening comparing participants and non-participants
M. L. Lousdal, T. Lash, W. Flanders, M. Brookhart +3 more
2020International Journal of Epidemiology18 citations Open access
Semantic Scholar
Long‐term colorectal cancer incidence and mortality after adenoma removal in women and men
Henriette C. Jodal, D. Klotz, Magnhild Herfindal, I. Barua +8 more
2021Alimentary Pharmacology and Therapeutics16 citations Open access
Semantic Scholar
Risk of malignant lymphomas in patients with inflammatory bowel disease: a population-based cohort study
Jingru Yu, E. Refsum, P. Wieszczy, L. Helsingen +8 more
2023BMJ Open Gastroenterology15 citations Open access
Semantic Scholar
Complete polyp resection with cold snare versus hot snare polypectomy for polyps of 4 – 9 mm: a randomized controlled trial
I. B. Pedersen, Anna Rawa-Gołębiewska, Audrey H. Calderwood, L. Brix +16 more
202214 citations
Semantic Scholar
A novel intragastric balloon for treatment of obesity and type 2 diabetes. A two-center pilot trial
C. Tønnesen, J. Hjelmesæth, D. Hofsø, S. Tonstad +10 more
2021Scandinavian Journal of Gastroenterology14 citations Open access
Semantic Scholar
Long-term effects of colonoscopy screening on colorectal cancer incidence and mortality: a multicountry, population-based randomised controlled trial.
M. F. Kamiński, M. Kalager, M. Løberg, Louise Emilsson +18 more
2026The Lancet13 citations
Semantic Scholar
Seroprevalence of antibodies against SARS-CoV-2 in the adult population during the pre-vaccination period, Norway, winter 2020/21
E. Anda, T. Braaten, K. Borch, T. Nøst +10 more
2022Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin13 citations Open access
Semantic Scholar
Covid-19 transmission in fitness centers in Norway - a randomized trial
L. Helsingen, M. Løberg, E. Refsum, Dagrun Kyte Gjøstein +24 more
2021BMC Public Health12 citations Open access
Semantic Scholar
Assessment of cancer screening effectiveness in the era of screening programs
H. Adami, M. Bretthauer, M. Kalager
2020European Journal of Epidemiology11 citations
Semantic Scholar
Leaving colorectal polyps in situ with endocytoscopy assisted by computer-aided diagnosis: a cost-effectiveness study
Natalie Halvorsen, I. Barua, S. Kudo, S. Gulati +15 more
2024Endoscopy10 citations
Semantic Scholar
Impact of artificial intelligence on colorectal polyp detection for early-career endoscopists: an international comparative study
Diba Ainechi, M. Misawa, I. Barua, Solveig Linnea Veen Larsen +17 more
2022Scandinavian Journal of Gastroenterology10 citations Open access
Semantic Scholar
Trust, threats, and consequences of the COVID-19 pandemic in Norway and Sweden: A comparative survey
L. Helsingen, E. Refsum, Dagrun Kyte Gjøstein, M. Løberg +3 more
2020medRxiv10 citations Open access
Semantic Scholar
Impact of time between faecal immunochemical tests in colorectal cancer screening on screening results: A natural experiment
S. G. Ribe, E. Botteri, M. Løberg, K. Randel +4 more
2022International Journal of Cancer9 citations Open access
Semantic Scholar
Seroprevalence of antibodies against SARS-CoV-2 virus in the adult Norwegian population, winter 2020/2021: pre-vaccination period
E. Anda, T. Braaten, K. Borch, T. Nøst +10 more
2021medRxiv9 citations Open access
Semantic Scholar
Mortality in Norway and Sweden before and after the Covid-19 outbreak: a cohort study
F. Juul, Henriette C. Jodal, I. Barua, E. Refsum +6 more
2020medRxiv8 citations Open access
Semantic Scholar
Randomized Re-Opening of Training Facilities during the COVID-19 pandemic
L. Helsingen, M. Løberg, Erle Refsum, Dagrun Kyte Gjøstein +12 more
2020medRxiv8 citations Open access
Semantic Scholar
Effect of colonoscopy screening on risks of colorectal cancer and related death: instrumental variable estimation of per-protocol effects
Joy Shi, M. Løberg, M. Kalager, P. Wieszczy +6 more
2025European Journal of Epidemiology7 citations
Semantic Scholar
Temporal trends in surgical treatment of inflammatory bowel disease following introduction of biological drugs in Norway and Sweden
A. Högdén, V. Perrin, H. Adami, M. Kalager +6 more
2025BMJ Open Gastroenterology7 citations Open access
Semantic Scholar
A Comparison of Risk Classification Systems of Colorectal Adenomas: A Case-Cohort Study.
Henriette C. Jodal, Paulina Wieszczy-Szczepanik, D. Klotz, Magnhild Herfindal +9 more
2023Gastroenterology6 citations Open access
Semantic Scholar

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