Mette Kalager

  • Researcher; MD, PhD

Original articles

Bretthauer M, Kalager M (2020)
Disparities in Preventive Health Services: Targeting Minorities and Majorities
Ann Intern Med (in press)
DOI 10.7326/M19-3899, PubMed 31931529

Kalager M, Bretthauer M (2020)
Improving cancer screening programs
Science, 367 (6474), 143-144
DOI 10.1126/science.aay3156, PubMed 31919207

Helsingen LM, Vandvik PO, Jodal HC, Murphy SB, Heen AF, Kalager M, Bretthauer M (2019)
Colorectal cancer screening, yes or no?
Tidsskr Nor Laegeforen, 139 (15)
DOI 10.4045/tidsskr.19.0323, PubMed 31642636

Helsingen LM, Vandvik PO, Jodal HC, Agoritsas T, Lytvyn L, Anderson JC, Auer R, Murphy SB, Almadi MA, Corley DA, Quinlan C, Fuchs JM, McKinnon A, Qaseem A, Heen AF, Siemieniuk RAC, Kalager M, Usher-Smith JA, Lansdorp-Vogelaar I, Bretthauer M, Guyatt G (2019)
Colorectal cancer screening with faecal immunochemical testing, sigmoidoscopy or colonoscopy: a clinical practice guideline
BMJ, 367, l5515
DOI 10.1136/bmj.l5515, PubMed 31578196

Wieszczy P, Kaminski MF, Franczyk R, Loberg M, Kobiela J, Rupinska M, Kocot B, Rupinski M, Holme O, Wojciechowska U, Didkowska J, Ransohoff D, Bretthauer M, Kalager M, Regula J (2019)
Colorectal Cancer Incidence and Mortality After Removal of Adenomas During Screening Colonoscopies
Gastroenterology (in press)
DOI 10.1053/j.gastro.2019.09.011, PubMed 31563625

Zahl PH, Kalager M, Suhrke P, Nord E (2019)
Quality-of-life effects of screening mammography in Norway
Int J Cancer, 146 (8), 2104-2112
DOI 10.1002/ijc.32539, PubMed 31254388

Kalager M (2019)
M. Kalager responds
Tidsskr Nor Laegeforen, 139 (11)
DOI 10.4045/tidsskr.19.0440, PubMed 31429242

Bleijenberg A, Klotz D, Løberg M, Dekker E, Adami HO, Kuipers EJ, Holme Ø, Kalager M, Emilsson L, Kleist B, Løvdal L, Regula J, Løberg EM, IJspeert J, Bretthauer M (2019)
Implications of different guidelines for surveillance after serrated polyp resection in United States of America and Europe
Endoscopy, 51 (8), 750-758
DOI 10.1055/a-0916-8598, PubMed 31195423

Seppälä TT, Ahadova A, Dominguez-Valentin M, Macrae F, Evans DG, Therkildsen C, Sampson J, Scott R, Burn J, Möslein G, Bernstein I, Holinski-Feder E, Pylvänäinen K, Renkonen-Sinisalo L, Lepistö A, Lautrup CK, Lindblom A, Plazzer JP, Winship I, Tjandra D, Katz LH, Aretz S, Hüneburg R, Holzapfel S, Heinimann K et al. (2019)
Lack of association between screening interval and cancer stage in Lynch syndrome may be accounted for by over-diagnosis; a prospective Lynch syndrome database report
Hered Cancer Clin Pract, 17, 8
DOI 10.1186/s13053-019-0106-8, PubMed 30858900

Refsum E, Helsingen LM, Jodal HC, Løberg M, Høstmælingen N, Kalager M (2019)
Data protection – an obstacle course
Tidsskr Nor Laegeforen, 139 (4)
DOI 10.4045/tidsskr.19.0077, PubMed 30808102

Lousdal ML, Møller MH, Kristiansen IS, Kalager M, Wisløff T, Støvring H (2018)
The Screening Illustrator: separating the effects of lead-time and overdiagnosis in mammography screening
Eur J Public Health, 28 (6), 1138-1142
DOI 10.1093/eurpub/cky085, PubMed 29796623

Jodal HC, Løberg M, Holme Ø, Adami HO, Bretthauer M, Emilsson L, Ransohoff DF, Hoff G, Kalager M (2018)
Mortality From Postscreening (Interval) Colorectal Cancers Is Comparable to That From Cancer in Unscreened Patients-A Randomized Sigmoidoscopy Trial
Gastroenterology, 155 (6), 1787-1794.e3
DOI 10.1053/j.gastro.2018.08.035, PubMed 30165051

Bretthauer M, Goderstad JM, Løberg M, Emilsson L, Ye W, Adami HO, Kalager M (2018)
Uterine morcellation and survival in uterine sarcomas
Eur J Cancer, 101, 62-68
DOI 10.1016/j.ejca.2018.06.007, PubMed 30025231

Pedersen IB, Løberg M, Hoff G, Kalager M, Bretthauer M, Holme Ø (2018)
Polypectomy techniques among gastroenterologists in Norway - a nationwide survey
Endosc Int Open, 6 (7), E812-E820
DOI 10.1055/a-0607-0727, PubMed 29977999

Pinsky PF, Loberg M, Senore C, Wooldrage K, Atkin W, Bretthauer M, Cross AJ, Hoff G, Holme O, Kalager M, Segnan N, Schoen RE (2018)
Number of Adenomas Removed and Colorectal Cancers Prevented in Randomized Trials of Flexible Sigmoidoscopy Screening
Gastroenterology, 155 (4), 1059-1068.e2
DOI 10.1053/j.gastro.2018.06.040, PubMed 29935150

Holme Ø, Løberg M, Kalager M, Bretthauer M, Hernán MA, Aas E, Eide TJ, Skovlund E, Lekven J, Schneede J, Tveit KM, Vatn M, Ursin G, Hoff G, NORCCAP Study Group† (2018)
Long-Term Effectiveness of Sigmoidoscopy Screening on Colorectal Cancer Incidence and Mortality in Women and Men: A Randomized Trial
Ann Intern Med, 168 (11), 775-782
DOI 10.7326/M17-1441, PubMed 29710125

Kalager M (2018)
[Health without knowledge?]
Tidsskr Nor Laegeforen, 138 (5)
DOI 10.4045/tidsskr.17.1058, PubMed 29513441

Emilsson L, García-Albéniz X, Logan RW, Caniglia EC, Kalager M, Hernán MA (2018)
Examining Bias in Studies of Statin Treatment and Survival in Patients With Cancer
JAMA Oncol, 4 (1), 63-70
DOI 10.1001/jamaoncol.2017.2752, PubMed 28822996

Emilsson L, Løberg M, Bretthauer M, Holme Ø, Fall K, Jodal HC, Adami HO, Kalager M (2017)
Colorectal cancer death after adenoma removal in Scandinavia
Scand J Gastroenterol, 52 (12), 1377-1384
DOI 10.1080/00365521.2017.1377763, PubMed 28906163

Holme Ø, Schoen RE, Senore C, Segnan N, Hoff G, Løberg M, Bretthauer M, Adami HO, Kalager M (2017)
Effectiveness of flexible sigmoidoscopy screening in men and women and different age groups: pooled analysis of randomised trials
BMJ, 356, i6673
DOI 10.1136/bmj.i6673, PubMed 28087510

Jørgensen KJ, Gøtzsche PC, Kalager M, Zahl PH (2017)
Breast Cancer Screening in Denmark: A Cohort Study of Tumor Size and Overdiagnosis
Ann Intern Med, 166 (5), 313-323
DOI 10.7326/M16-0270, PubMed 28114661

Adami HO, Csermely P, Veres DV, Emilsson L, Løberg M, Bretthauer M, Kalager M (2016)
Are rapidly growing cancers more lethal?
Eur J Cancer, 72, 210-214
DOI 10.1016/j.ejca.2016.11.011, PubMed 28042992

Huitfeldt A, Hernan MA, Kalager M, Robins JM (2016)
Comparative Effectiveness Research Using Observational Data: Active Comparators to Emulate Target Trials with Inactive Comparators
EGEMS (Wash DC), 4 (1), 1234
DOI 10.13063/2327-9214.1234, PubMed 27891526

Jørgensen KJ, Kalager M, Barratt A, Baines C, Zahl PH, Brodersen J, Harris RP (2016)
Overview of guidelines on breast screening: Why recommendations differ and what to do about it
Breast, 31, 261-269
DOI 10.1016/j.breast.2016.08.002, PubMed 27717717

Gjøstein DK, Huitfeldt A, Løberg M, Adami HO, Garborg K, Kalager M, Bretthauer M (2016)
Incentives and participation in a medical survey
Tidsskr Nor Laegeforen, 136 (12-13), 1082-7
DOI 10.4045/tidsskr.15.1096, PubMed 27381786

Bretthauer M, Kaminski MF, Løberg M, Zauber AG, Regula J, Kuipers EJ, Hernán MA, McFadden E, Sunde A, Kalager M, Dekker E, Lansdorp-Vogelaar I, Garborg K, Rupinski M, Spaander MC, Bugajski M, Høie O, Stefansson T, Hoff G, Adami HO, Nordic-European Initiative on Colorectal Cancer (NordICC) Study Group (2016)
Population-Based Colonoscopy Screening for Colorectal Cancer: A Randomized Clinical Trial
JAMA Intern Med, 176 (7), 894-902
DOI 10.1001/jamainternmed.2016.0960, PubMed 27214731

Garborg K, Wiig H, Hasund A, Matre J, Holme Ø, Noraberg G, Løberg M, Kalager M, Adami HO, Bretthauer M (2016)
Gradual stiffness versus magnetic imaging-guided variable stiffness colonoscopes: A randomized noninferiority trial
United European Gastroenterol J, 5 (1), 128-133
DOI 10.1177/2050640616639162, PubMed 28405331

Berstad P, Botteri E, Larsen IK, Løberg M, Kalager M, Holme Ø, Bretthauer M, Hoff G (2016)
Lifestyle changes at middle age and mortality: a population-based prospective cohort study
J Epidemiol Community Health, 71 (1), 59-66
DOI 10.1136/jech-2015-206760, PubMed 27312250

Holme Ø, de Lange T, Stallemo A, Wiig H, Hasund A, Dvergsnes K, Garborg K, Ystrøm CM, Løberg M, Hoff G, Bretthauer M, Kalager M (2016)
Routine vs. on-demand analgesia in colonoscopy: a randomized clinical trial
Endoscopy, 48 (9), 823-8
DOI 10.1055/s-0042-108433, PubMed 27305424

Jover R, Bretthauer M, Dekker E, Holme Ø, Kaminski MF, Løberg M, Zauber AG, Hernán MA, Lansdorp-Vogelaar I, Sunde A, McFadden E, Castells A, Regula J, Quintero E, Pellisé M, Senore C, Kalager M, Dinis-Ribeiro M, Emilsson L, Ransohoff DF, Hoff G, Adami HO (2016)
Rationale and design of the European Polyp Surveillance (EPoS) trials
Endoscopy, 48 (6), 571-8
DOI 10.1055/s-0042-104116, PubMed 27042931

Adami HO, Bretthauer M, Emilsson L, Hernán MA, Kalager M, Ludvigsson JF, Ekbom A (2016)
The continuing uncertainty about cancer risk in inflammatory bowel disease
Gut, 65 (6), 889-93
DOI 10.1136/gutjnl-2015-311003, PubMed 27008845

Swanson SA, Holme Ø, Løberg M, Kalager M, Bretthauer M, Hoff G, Aas E, Hernán MA (2015)
Bounding the per-protocol effect in randomized trials: an application to colorectal cancer screening
Trials, 16, 541
DOI 10.1186/s13063-015-1056-8, PubMed 26620120

Bretthauer M, Kalager M, Adami HO (2015)
Do's and don'ts in evaluation of endoscopic screening for gastrointestinal cancers
Endoscopy, 48 (1), 75-80
DOI 10.1055/s-0034-1393094, PubMed 26382306

Huitfeldt A, Kalager M, Robins JM, Hoff G, Hernán MA (2015)
Methods to Estimate the Comparative Effectiveness of Clinical Strategies that Administer the Same Intervention at Different Times
Curr Epidemiol Rep, 2 (3), 149-161
DOI 10.1007/s40471-015-0045-5, PubMed 26587368

Garborg K, Kaminski MF, Lindenburger W, Wiig H, Hasund A, Wronska E, Bie RB, Kleist B, Løvdal L, Holme Ø, Kalager M, Hoff G, Bretthauer M (2014)
Water exchange versus carbon dioxide insufflation in unsedated colonoscopy: a multicenter randomized controlled trial
Endoscopy, 47 (3), 192-9
DOI 10.1055/s-0034-1390795, PubMed 25412093

Holme Ø, Bretthauer M, Eide TJ, Løberg EM, Grzyb K, Løberg M, Kalager M, Adami HO, Kjellevold Ø, Hoff G (2014)
Long-term risk of colorectal cancer in individuals with serrated polyps
Gut, 64 (6), 929-36
DOI 10.1136/gutjnl-2014-307793, PubMed 25399542

Berstad P, Løberg M, Larsen IK, Kalager M, Holme Ø, Botteri E, Bretthauer M, Hoff G (2014)
Long-term lifestyle changes after colorectal cancer screening: randomised controlled trial
Gut, 64 (8), 1268-76
DOI 10.1136/gutjnl-2014-307376, PubMed 25183203

Løberg M, Kalager M, Holme Ø, Hoff G, Adami HO, Bretthauer M (2014)
Long-term colorectal-cancer mortality after adenoma removal
N Engl J Med, 371 (9), 799-807
DOI 10.1056/NEJMoa1315870, PubMed 25162886

Holme Ø, Løberg M, Kalager M, Bretthauer M, Hernán MA, Aas E, Eide TJ, Skovlund E, Schneede J, Tveit KM, Hoff G (2014)
Effect of flexible sigmoidoscopy screening on colorectal cancer incidence and mortality: a randomized clinical trial
JAMA, 312 (6), 606-15
DOI 10.1001/jama.2014.8266, PubMed 25117129

Kalager M, Løberg M, Bretthauer M, Adami HO (2014)
Comparative analysis of breast cancer mortality following mammography screening in Denmark and Norway
Ann Oncol, 25 (6), 1137-43
DOI 10.1093/annonc/mdu122, PubMed 24669012

Hassan C, Quintero E, Dumonceau JM, Regula J, Brandão C, Chaussade S, Dekker E, Dinis-Ribeiro M, Ferlitsch M, Gimeno-García A, Hazewinkel Y, Jover R, Kalager M, Loberg M, Pox C, Rembacken B, Lieberman D, European Society of Gastrointestinal Endoscopy (2013)
Post-polypectomy colonoscopy surveillance: European Society of Gastrointestinal Endoscopy (ESGE) Guideline
Endoscopy, 45 (10), 842-51
DOI 10.1055/s-0033-1344548, PubMed 24030244

Thiis-Evensen E, Kalager M, Bretthauer M, Hoff G (2013)
Long-term effectiveness of endoscopic screening on incidence and mortality of colorectal cancer: A randomized trial
United European Gastroenterol J, 1 (3), 162-8
DOI 10.1177/2050640613483290, PubMed 24917955

Kalager M, Tamimi RM, Bretthauer M, Adami HO (2012)
Prognosis in women with interval breast cancer: population based observational cohort study
BMJ, 345, e7536
DOI 10.1136/bmj.e7536, PubMed 23160783

Garborg KK, Løberg M, Matre J, Holme O, Kalager M, Hoff G, Bretthauer M (2012)
Reduced pain during screening colonoscopy with an ultrathin colonoscope: a randomized controlled trial
Endoscopy, 44 (8), 740-6
DOI 10.1055/s-0032-1309755, PubMed 22622786

Kalager M, Adami HO, Bretthauer M, Tamimi RM (2012)
Overdiagnosis of invasive breast cancer due to mammography screening: results from the Norwegian screening program
Ann Intern Med, 156 (7), 491-9
DOI 10.7326/0003-4819-156-7-201204030-00005, PubMed 22473436

Kalager M, Zelen M, Langmark F, Adami HO (2010)
Effect of screening mammography on breast-cancer mortality in Norway
N Engl J Med, 363 (13), 1203-10
DOI 10.1056/NEJMoa1000727, PubMed 20860502

Kalager M, Kåresen R, Wist E (2009)
[Survival after breast cancer--differences between Norwegian counties]
Tidsskr Nor Laegeforen, 129 (24), 2595-600
DOI 10.4045/tidsskr.09.0024, PubMed 20029554

Kalager M, Haldorsen T, Bretthauer M, Hoff G, Thoresen SO, Adami HO (2009)
Improved breast cancer survival following introduction of an organized mammography screening program among both screened and unscreened women: a population-based cohort study
Breast Cancer Res, 11 (4), R44
DOI 10.1186/bcr2331, PubMed 19575807

Review articles

Emilsson L, Holme Ø, Bretthauer M, Cook NR, Buring JE, Løberg M, Adami HO, Sesso HD, Gaziano MJ, Kalager M (2016)
Systematic review with meta-analysis: the comparative effectiveness of aspirin vs. screening for colorectal cancer prevention
Aliment Pharmacol Ther, 45 (2), 193-204
DOI 10.1111/apt.13857, PubMed 27859394

Løberg M, Lousdal ML, Bretthauer M, Kalager M (2015)
Benefits and harms of mammography screening
Breast Cancer Res, 17, 63
DOI 10.1186/s13058-015-0525-z, PubMed 25928287

Hassan C, Gimeno-García A, Kalager M, Spada C, Zullo A, Costamagna G, Senore C, Rex DK, Quintero E (2014)
Systematic review with meta-analysis: the incidence of advanced neoplasia after polypectomy in patients with and without low-risk adenomas
Aliment Pharmacol Ther, 39 (9), 905-12
DOI 10.1111/apt.12682, PubMed 24593121

Garborg K, Holme Ø, Løberg M, Kalager M, Adami HO, Bretthauer M (2013)
Current status of screening for colorectal cancer
Ann Oncol, 24 (8), 1963-72
DOI 10.1093/annonc/mdt157, PubMed 23619033

Bretthauer M, Kalager M (2013)
Principles, effectiveness and caveats in screening for cancer
Br J Surg, 100 (1), 55-65
DOI 10.1002/bjs.8995, PubMed 23212620

Other articles

Zahl PH, Kalager M (2019)
Reply to: Loss of QALY in mammography screening reported by Zahl et al
Int J Cancer, 146 (4), 1177
DOI 10.1002/ijc.32755, PubMed 31652342

Helsingen LM, Vandvik PO, Jodal HC, Murphy SB, Heen AF, Kalager M, Bretthauer M (2019)
Colorectal cancer screening, right?
Tidsskr. Nor. Laegeforen., 139 (15), 1450-1451

Holme Ø, Bretthauer M, Løberg M, Kalager M, Adami HO (2019)
Reply to the letter to the editor 'Cancer survivors: surveillance or not surveillance?' by Santeufemia and Miolo
Ann Oncol, 30 (9), 1531-1532
DOI 10.1093/annonc/mdz190, PubMed 31198953

Kalager M (2019)
StatMed - well intended but unknowable Reply
Tidsskr. Nor. Laegeforen., 139 (11), 1017

Holme Ø, Bretthauer M, Løberg M, Kalager M, Adami HO (2019)
Revisiting surveillance schemes for cancer survivors
Ann Oncol, 30 (6), 881-883
DOI 10.1093/annonc/mdz107, PubMed 30895293

Kalager M (2019)
StatMed- the new oil?
Tidsskr. Nor. Laegeforen., 139 (9), 783

Kalager M (2019)
StatMed – the new oil?
Tidsskr Nor Laegeforen, 139 (9)
DOI 10.4045/tidsskr.19.0349, PubMed 31140239

Bretthauer M, Kalager M, Weinberg DS (2019)
From Colorectal Cancer Screening Guidelines to Headlines: Beware!
Ann Intern Med, 170 (10), 734
DOI 10.7326/L19-0086, PubMed 31108525

Adami HO, Kalager M, Valdimarsdottir U, Bretthauer M, Ioannidis JPA (2019)
Author Reply to: The name of the game: Is preventive screening "cancer screening?"
Eur J Clin Invest, 49 (6), UNSP e13097
DOI 10.1111/eci.13097, PubMed 30829396

Refsum E, Helsingen LM, Jodal HC, Loberg M, Hostmaelingen N, Kalager M (2019)
Privacy - an obstacle course
Tidsskr. Nor. Laegeforen., 139 (4), 314-315

Adami HO, Kalager M, Valdimarsdottir U, Bretthauer M, Ioannidis JPA (2019)
Time to abandon early detection cancer screening
Eur J Clin Invest, 49 (3), e13062
DOI 10.1111/eci.13062, PubMed 30565674

Holme Ø, Løberg M, Kalager M, Bretthauer M, Hoff G (2018)
Long-Term Effectiveness of Sigmoidoscopy Screening in Women and Men
Ann Intern Med, 169 (9), 663-664
DOI 10.7326/L18-0512, PubMed 30398636

Bretthauer M, Kalager M (2018)
When no guideline recommendation is the best recommendation
Lancet, 392 (10151), 898-899
DOI 10.1016/S0140-6736(18)31671-4, PubMed 30238877

Kalager M, Wieszczy P, Lansdorp-Vogelaar I, Corley DA, Bretthauer M, Kaminski MF (2018)
Overdiagnosis in Colorectal Cancer Screening: Time to Acknowledge a Blind Spot
Gastroenterology, 155 (3), 592-595
DOI 10.1053/j.gastro.2018.07.037, PubMed 30076834

Bretthauer M, Kalager M, Weinberg DS (2018)
From Colorectal Cancer Screening Guidelines to Headlines: Beware!
Ann Intern Med, 169 (6), 405-406
DOI 10.7326/M18-1720, PubMed 29987330

Halvorsen JA, Løberg M, Gjersvik P, Roscher I, Veierød MB, Robsahm TE, Nilsen LTN, Kalager M, Bretthauer M (2018)
Why a randomized melanoma screening trial is not a good idea
Br J Dermatol, 179 (2), 532-533
DOI 10.1111/bjd.16784, PubMed 29893490

Juul FE, Garborg K, Bretthauer M, Skudal H, Øines MN, Wiig H, Rose Ø, Seip B, Lamont JT, Midtvedt T, Valeur J, Kalager M, Holme Ø, Helsingen L, Løberg M, Adami HO (2018)
Fecal Microbiota Transplantation for Primary Clostridium difficile Infection
N Engl J Med, 378 (26), 2535-2536
DOI 10.1056/NEJMc1803103, PubMed 29860912

Løberg M, Kalager M, Hoff G (2018)
Tailoring the message with selective reporting
Eur J Epidemiol, 33 (8), 773
DOI 10.1007/s10654-018-0416-6, PubMed 29846866

Kalager M (2018)
Health without knowledge?
Tidsskr. Nor. Laegeforen., 138 (5), 432-433

Kalager M (2017)
Breast cancer screening
BMJ, 359, j5625
DOI 10.1136/bmj.j5625, PubMed 29212770

Jørgensen KJ, Gøtzsche PC, Kalager M, Zahl PH (2017)
Breast Cancer Screening in Denmark
Ann Intern Med, 167 (7), 524
DOI 10.7326/L17-0270, PubMed 28973200

Løberg M, Holme Ø, Bretthauer M, Kalager M (2017)
Colorectal adenomas, surveillance, and cancer
Lancet Oncol, 18 (8), e427
DOI 10.1016/S1470-2045(17)30473-4, PubMed 28759374

Kalager M (2017)
[Share data]
Tidsskr Nor Laegeforen, 137 (10), 679
DOI 10.4045/tidsskr.17.0446, PubMed 28551946

Kalager M, Stoltenberg C (2017)
[Screening for the individual and knowledge for all]
Tidsskr Nor Laegeforen, 137 (12-13), 858
DOI 10.4045/tidsskr.17.0445, PubMed 28655269

Olsen SE, Bretthauer M, Kalager M (2017)
More harm than benefit - how much should the patients know? Reply
Tidsskr. Nor. Laegeforen., 137 (9), 599

Olsen SE, Bretthauer M, Kalager M (2017)
S.E. Olsen og medarbeidere svarer
Tidsskr Nor Laegeforen, 137 (9), 599
DOI 10.4045/tidsskr.17.0296, PubMed 28468459

Holme Ø, Løberg M, Bretthauer M, Kalager M (2017)
Authors' reply to Doherty and Hawkins
BMJ, 356, j1267
DOI 10.1136/bmj.j1267, PubMed 28283482

Olsen SE, Bretthauer M, Kalager M (2017)
[More harm than benefit - how much should the patients know?]
Tidsskr Nor Laegeforen, 137 (3), 175-176
DOI 10.4045/tidsskr.16.0954, PubMed 28181749

Løberg M, Holme Ø, Kalager M (2016)
Aspirin, Colorectal Cancer, and Cause of Death: A Complex Landscape
J Clin Oncol, 35 (5), 568-569
DOI 10.1200/JCO.2016.70.3751, PubMed 29236619

Bretthauer M, Kaminski MF, Hassan C, Kalager M, Holme Ø, Hoff G, Løberg M, Regula J, Castells A, Adami HO (2016)
America, We Are Confused: The Updated U.S. Preventive Services Task Force Recommendation on Colorectal Cancer Screening
Ann Intern Med, 166 (2), 139-140
DOI 10.7326/M16-1805, PubMed 27820949

Bretthauer M, Kalager M, Adami HO, Hoff G (2016)
Who Is for CO2? Slow Adoption of Carbon Dioxide Insufflation in Colonoscopy
Ann Intern Med, 165 (2), 145-6
DOI 10.7326/M16-0209, PubMed 27159139

Løberg M, Kalager M, Bretthauer M (2016)
Commentary: "Randomize, Then Consent" or "Consent, Then Randomize"?: Revitalizing the Issue of Preconsent Randomization
Epidemiology, 27 (3), 393-4
DOI 10.1097/EDE.0000000000000469, PubMed 26849639

Kalager M, Adami HO, Bretthauer M (2016)
Recognizing Data Generation
N Engl J Med, 374 (19), 1898
DOI 10.1056/NEJMc1603789, PubMed 27096437

Holme Ø, Loberg M, Kalager M (2014)
Colorectal cancer and the effect of flexible sigmoidoscopy screening--reply
JAMA, 312 (22), 2411-2
DOI 10.1001/jama.2014.14695, PubMed 25490338

Bretthauer M, Løberg M, Kalager M (2014)
Long-term colorectal-cancer mortality after adenoma removal
N Engl J Med, 371 (21), 2036-7
DOI 10.1056/NEJMc1411954, PubMed 25409378

Bretthauer M, Loberg M, Kalager M (2014)
Long-Term Colorectal-Cancer Mortality after Adenoma Removal REPLY
N. Engl. J. Med., 371 (21), 2035-2036

Kalager M, Adami HO, Bretthauer M (2014)
Too much mammography
BMJ, 348, g1403
DOI 10.1136/bmj.g1403, PubMed 24519765

Kalager M (2013)
Overdiagnosis in breast cancer screening: women have minimal prior awareness of the issue, and their screening intentions are influenced by the size of the risk
Evid Based Nurs, 17 (1), 7-8
DOI 10.1136/eb-2013-101281, PubMed 24001593

Kalager M, Løberg M, Fønnebø VM, Bretthauer M (2013)
Failure to account for selection-bias
Int J Cancer, 133 (11), 2751-3
DOI 10.1002/ijc.28244, PubMed 23649899

Smith RA, Kerlikowske K, Miglioretti DL, Kalager M (2012)
Clinical decisions. Mammography screening for breast cancer
N Engl J Med, 367 (21), e31
DOI 10.1056/NEJMclde1212888, PubMed 23171121

Berstad P, Løberg M, Kalager M, Jørgensen A, Garborg K, Ruud HK, Bretthauer M, Hoff G (2012)
Risk stratification for advanced colorectal neoplasia--letter
Cancer Prev Res (Phila), 5 (12), 1405; author reply 1406
DOI 10.1158/1940-6207.CAPR-12-0383, PubMed 23151804

Kalager M, Løberg M, Bretthauer M (2012)
Limited use of nonprogram screening in Norway
Int J Cancer, 132 (7), 1723-4
DOI 10.1002/ijc.27807, PubMed 22933134

Jørgensen KJ, Kalager M, Zahl PH, Fønnebø VM (2012)
Comparing attendees with non-attendees in breast screening does not provide useful information about an effect on prognostic features or mortality
Breast Cancer Res Treat, 136 (2), 617-8, author reply 619-20
DOI 10.1007/s10549-012-2250-y, PubMed 23011508

Kalager M, Adami HO, Bretthauer M, Tamimi RM (2012)
Overdiagnosis of Invasive Breast Cancer due to Mammography Screening RESPONSE
Ann. Intern. Med., 157 (3), 221-222

Kalager M (2012)
Letter to the Editor: Hofvind S, Skaane P. Stage distribution of breast cancer diagnosed before and after implementation of population-based mammographic screening. Fortschr Röntgenstr 2012; 184: 437-442
Rofo, 184 (8), 746; author reply 746-7
DOI 10.1055/s-0032-1313010, PubMed 22851265

Bretthauer M, Kalager M (2012)
Colorectal-Cancer Screening Reply
N. Engl. J. Med., 366 (22), 2131

Bretthauer M, Kalager M (2012)
Colonoscopy as a triage screening test
N Engl J Med, 366 (8), 759-60
DOI 10.1056/NEJMe1114639, PubMed 22356330

Kalager M (2012)
[First, do no harm]
Tidsskr Nor Laegeforen, 132 (4), 383
DOI 10.4045/tidsskr.12.0079, PubMed 22353816

Kalager M (2011)
Regression of screening-detected breast cancer
Lancet Oncol, 12 (12), 1083-4
DOI 10.1016/S1470-2045(11)70262-5, PubMed 21996167

Kalager M, Bretthauer M (2009)
Spontaneous regression of invasive breast cancer: does this study answer the question?
Arch Intern Med, 169 (10), 997
DOI 10.1001/archinternmed.2009.91, PubMed 19468097

Kalager M (2008)
[Unclear about overdiagnosis of breast cancer]
Ugeskr Laeger, 170 (33), 2473; author reply 2473
PubMed 18763381

Bretthauer M, Kalager M (2000)
[Practice from Germany not sanctioned as specialist education in Norway]
Tidsskr Nor Laegeforen, 120 (21), 2580-1
PubMed 11071005

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