Johannes Blom

Publikationer
CV
Populärvetenskap och samverkan

Artiklar

Article: CLINICAL AND TRANSLATIONAL GASTROENTEROLOGY. 2025;16(1):e00790
Candidate Genetic Loci Modifying the Colorectal Cancer Risk Caused by Lifestyle Risk Factors
Barot S; Vermani L; Blom J; Larsson S; Liljegren A; Lindblom A
Article: BMJ OPEN GASTROENTEROLOGY. 2024;11(1):e001574
Costs of colorectal cancer screening in Sweden: an observational, longitudinal cost description
Johansson N; Nystrand C; Blom J
Article: FAMILIAL CANCER. 2024;23(4):599-605
Complications of colonoscopy surveillance of patients with Lynch syndrome-33 years of follow up
Frank A; Bernstedt SW; Jamizadeh N; Forsberg A; Hedin C; Blom J; Backman A-S
Article: JOURNAL OF MEDICAL SCREENING. 2024;31(1):8-14
Interval cancer after two rounds of a Swedish population-based screening program using gender-specific cut-off levels in fecal immunochemical test
Wilen HR; Blom J
Article: JOURNAL OF MEDICAL SCREENING. 2024;31(1):15-20
Colorectal cancer screening with faecal immunochemical test: Patterns of participation
Heyman H; Blom J; Saraste D
Article: JAMA NETWORK OPEN. 2024;7(2):e240516
Routine Fecal Occult Blood Screening and Colorectal Cancer Mortality in Sweden
Blom J; Saraste D; Toernberg S; Jonsson H
Article: BMJ OPEN GASTROENTEROLOGY. 2023;10(1):e001037
Risk of malignant lymphomas in patients with inflammatory bowel disease: a population-based cohort study
Yu J; Refsum E; Wieszczy P; Helsingen LM; Perrin V; Hogden A; Loberg M; Blom J; Bretthauer M; Adami H-O; Ye W; Kalager M
Journal article: COCHRANE DATABASE OF SYSTEMATIC REVIEWS. 2023;2023(1)
Prognostic models for colorectal cancer incidence and mortality in patients with inflammatory bowel disease
Gantzel R; Wieszczy P; Refsum E; Jess T; Larsen L; Bretthauer M; Vandvik PO; Blom J; Erichsen R; Kalager M; Helsingen L
Article: JOURNAL OF MEDICAL SCREENING. 2022;29(3):156-165
Interval cancers in a population-based screening program for colorectal cancer with gender-specific cut-off levels for fecal immunochemical test
Wilen HR; Saraste D; Blom J
Article: STATISTICAL METHODS IN MEDICAL RESEARCH. 2022;31(8):1538-1548
Estimating and testing the influence of early diagnosis on cancer survival via point effects of diagnoses and treatments
Wang X; Blom J; Ye W; Yin L
Article: ANNALS OF ONCOLOGY. 2022;33(6):649-656
Inflammatory bowel disease and risk of adenocarcinoma and neuroendocrine tumors in the small bowel
Yu J; Refsum E; Perrin V; Helsingen LM; Wieszczy P; Loberg M; Bretthauer M; Adami HO; Ye W; Blom J; Kalager M
Article: LANCET GASTROENTEROLOGY & HEPATOLOGY. 2022;7(6):513-521
Once-only colonoscopy or two rounds of faecal immunochemical testing 2 years apart for colorectal cancer screening (SCREESCO): preliminary report of a randomised controlled trial
Forsberg A; Westerberg M; Metcalfe C; Steele R; Blom J; Engstrand L; Fritzell K; Hellstrom M; Levin L-A; Lowbeer C; Pischel A; Stromberg U; Tornberg S; Wengstrom Y; Ekbom A; Holmberg L; Hultcrantz R
Article: UNITED EUROPEAN GASTROENTEROLOGY JOURNAL. 2022;10(2):212-224
Risk of hepato-pancreato-biliary cancer is increased by primary sclerosing cholangitis in patients with inflammatory bowel disease: A population-based cohort study
Yu J; Refsum E; Helsingen LM; Folseraas T; Ploner A; Wieszczy P; Barua I; Jodal HC; Melum E; Loberg M; Blom J; Bretthauer M; Adami H-O; Kalager M; Ye W
Article: JOURNAL OF MEDICAL SCREENING. 2021;28(4):439-447
Gender-specific cut-off levels in colorectal cancer screening with fecal immunochemical test: A population-based study of colonoscopy findings and costs
Wilen HR; Saraste D; Blom J
Journal article: CANCER RESEARCH. 2021;81(13_Supplement):841
Abstract 841: Risk of hepatobiliary & pancreatic cancer in inflammatory bowel disease
Yu J; Refsum E; Helsingen LM; Folseraas T; Ploner A; Wieszczy P; Barua I; Jodal HC; Melum E; Løberg M; Blom J; Bretthauer M; Adami H-O; Kalager M; Ye W
Article: JOURNAL OF MEDICAL SCREENING. 2019;26(2):92-97
Gender-specific cut-offs in colorectal cancer screening with FIT: Increased compliance and equal positivity rate
Blom J; Lowbeer C; Elfstrom KM; Sventelius M; Ohman D; Saraste D; Tornberg S
Article: SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY. 2019;54(3):303-310
Fecal immunochemical test in cancer screening - colonoscopy outcome in FIT positives and negatives
Wilen HR; Blom J; Hoijer J; Andersson G; Lowbeer C; Hultcrantz R
Article: JOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY. 2019;34(1):103-112
Fecal immunochemical test in colorectal cancer screening: Colonoscopy findings by different cut-off levels
Wilen HR; Blom J; Hoijer J; Hultcrantz R
Article: JOURNAL OF MEDICAL SCREENING. 2018;25(3):126-133
Initial participation as a predictor for continuous participation in population-based colorectal cancer screening
Saraste D; Ohman DJ; Sventelius M; Elfstrom KM; Blom J; Tornberg S
Article: JOURNAL OF MEDICAL SCREENING. 2017;24(3):146-152
Interval cancers in a guaiac-based colorectal cancer screening programme: Consequences on sensitivity
Blom J; Tornberg S
Article: JOURNAL OF MEDICAL SCREENING. 2017;24(2):69-74
Screening vs. non-screening detected colorectal cancer: Differences in pre-therapeutic work up and treatment
Saraste D; Martling A; Nilsson PJ; Blom J; Tornberg S; Janson M
Article: JOURNAL OF MEDICAL SCREENING. 2016;23(3):135-140
Complications after colonoscopy and surgery in a population-based colorectal cancer screening programme
Saraste D; Martling A; Nilsson PJ; Blom J; Tornberg S; Hultcrantz R; Janson M
Article: EUROPEAN SURGERY-ACTA CHIRURGICA AUSTRIACA. 2016;48(4):209-214
Clinical and inflammatory response to first ileocolic resection for Crohn's disease An analysis of 117 cases
Wilen HR; Nystrom P-O; Torkvist L; Blom J
Article: JOURNAL OF MEDICAL SCREENING. 2015;22(3):119-126
Participation rates for organized colorectal cancer screening programmes: an international comparison
Klabunde C; Blom J; Bulliard J-L; Garcia M; Hagoel L; Mai V; Patnick J; Rozjabek H; Senore C; Tornberg S
Article: LAKARTIDNINGEN. 2014;111(40):1717-1719
[Surgical course with focus on intercultural competence. Equal outcomes among Swedish and foreign medical students].
Blom J; Barman L; Wirén M; Jansson H; Nordenström J
Article: JOURNAL OF MEDICAL SCREENING. 2014;21(3):144-150
Five-year experience of organized colorectal cancer screening in a Swedish population - increased compliance with age, female gender, and subsequent screening round
Blom J; Inen SK; Hultcrantz R; Tornberg S
Article: COLORECTAL DISEASE. 2014;16(8):626-630
Results of collagen plug occlusion of anal fistula: a multicentre study of 126 patients
Blom J; Husberg-Sellberg B; Lindelius A; Gustafsson U-M; Carlens S; Oppelstrup H; Bragmark M; Yin L; Nystrom P-O
Article: ENDOSCOPY. 2013;45(1):51-59
European guidelines for quality assurance in colorectal cancer screening and diagnosis: Overview and introduction to the full Supplement publication
von Karsa L; Patnick J; Segnan N; Atkin W; Halloran S; Lansdorp-Vogelaar I; Malila N; Minozzi S; Moss S; Quirke P; Steele RJ; Vieth M; Aabakken L; Altenhofen L; Ancelle-Park R; Antoljak N; Anttila A; Armaroli P; Arrossi S; Austoker J; Banzi R; Bellisario C; Blom J; Brenner H; Bretthauer M; Cancela MC; Costamagna G; Cuzick J; Dai M; Daniel J; Dekker E; Delicata N; Ducarroz S; Erfkamp H; Espinas JA; Faivre J; Wood LF; Flugelman A; Frkovic-Grazio S; Geller B; Giordano L; Grazzini G; Green J; Hamashima C; Herrmann C; Hewitson P; Hoff G; Holten I; Jover R; Kaminski MF; Kuipers EJ; Kurtinaitis J; Lambert R; Launoy G; Lee W; Leicester R; Leja M; Lieberman D; Lignini T; Lucas E; Lynge E; Madai S; Marinho J; Zakotnik JM; Minoli G; Monk C; Morais A; Muwonge R; Nadel M; Neamtiu L; Tuser MP; Pignone M; Pox C; Primic-Zakelj M; Psaila J; Rabeneck L; Ransohoff D; Rasmussen M; Regula J; Ren J; Rennert G; Rey J; Riddell RH; Risio M; Rodrigues V; Saito H; Sauvaget C; Scharpantgen A; Schmiegel W; Senore C; Siddiqi M; Sighoko D; Smith R; Smith S; Suchanek S; Suonio E; Tong W; Tornberg S; Van Cutsem E; Vignatelli L; Villain P; Voti L; Watanabe H; Watson J; Winawer S; Young G; Zaksas V; Zappa M; Valori R
Article: TECHNIQUES IN COLOPROCTOLOGY. 2011;15(3):327-330
Endoanal ultrasonography may distinguish Crohn's anal fistulae from cryptoglandular fistulae in patients with Crohn's disease: a cross-sectional study
Blom J; Nystrom PO; Gunnarsson U; Strigard K
Article: LAKARTIDNINGEN. 2009;106(47):3134
[Why do not socioeconomically disadvantaged persons want to participate in preventive health work?].
Blom J
Article: CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION. 2008;17(5):1163-1168
A 9-year follow-up study of participants and nonparticipants in sigmoidoscopy screening:: Importance of self-selection
Blom J; Yin L; Liden A; Dolk A; Jeppsson B; Pahlman L; Holmberg L; Nyren O
Article: INTERNATIONAL JOURNAL OF CANCER. 2008;122(7):1618-1623
Toward understanding non participation in sigmoidoscopy screening for colorectal cancer
Blom J; Yin L; Liden A; Dolk A; Jeppsson B; Pahlman L; Holmberg L; Nyren O
Article: EJSO. 2004;30(4):362-369
Colorectal cancer screening with flexible sigmoidoscopy-participants' experiences and technical feasibility
Blom J; Lidén A; Nilsson J; Påhlman L; Nyrén O; Holmberg L
Article: EJSO. 2002;28(8):827-831
Compliance and findings in a Swedish population screened for colorectal cancer with sigmoidoscopy
Blom J; Lidén A; Jeppsson B; Holmberg L; Påhlman L
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Alla övriga publikationer

Review: SCANDINAVIAN JOURNAL OF GASTROENTEROLOGY. 2025;60(5):421-429
Temporal trends in characteristics and management of inflammatory bowel disease
Young JC; Helsingen LM; Refsum E; Hoegden A; Perrin V; Loberg M; Gantzel RH; Bretthauer M; Berglund A; Holme O; Jodal HC; Grimstad T; Brackmann SA; Ye W; Adami H-O; Larsen L; Hernan MA; Jess T; Blom J; Kalager M
Conference publication: PHARMACOEPIDEMIOLOGY AND DRUG SAFETY. 2023;32:336
Closing the gap on inflammatory bowel disease treatments and the risk of cancer: An international collaboration combining national registries with medical chart abstraction
Young JC; Helsingen L; Refsum E; Perrin V; Gantzel RH; Erichsen R; Hogden A; Berglund A; Adami H-O; Jess T; Blom J; Hernan MA; Kalager M
Conference publication: CANCER RESEARCH. 2021;81(13)
Risk of hepatobiliary & pancreatic cancer in inflammatory bowel disease
Yu J; Refsum E; Helsingen LM; Folseraas T; Ploner A; Wieszczy P; Barua I; Jodal HC; Melum E; Loberg M; Blom J; Bretthauer M; Adami H-O; Kalager M; Ye W
Review: EUROPEAN JOURNAL OF CANCER. 2014;50(2):434-446
Sorting out measures and definitions of screening participation to improve comparability: The example of colorectal cancer
Bulliard J-L; Garcia M; Blom J; Senore C; Mai V; Klabunde C
Other: BMJ EVIDENCE-BASED MEDICINE. 2010;15(5):155-156
Once-only flexible sigmoidoscopy screening for adults aged 55-64 years old reduces the incidence of colorectal cancer and colorectal cancer deaths.
Blom J
Letter: INFLAMMATORY BOWEL DISEASES. 2010;16(6):907-909
Analysis of 39 Crohn's Disease Risk Loci in Swedish Inflammatory Bowel Disease Patients
Torkvist L; Halfvarson J; Ong RTH; Lordal M; Sjoqvist U; Bresso F; Bjork J; Befrits R; Lofberg R; Blom J; Carlson M; Padyukov L; D'Amato M; Seielstad M; Pettersson S
Review: LAKARTIDNINGEN. 2008;105(38):2564-2567
[Colorectal cancer screening should be evaluated in Swedish studies].
Blom J
Doctoral thesis: 2007
Aspects of participation in sigmoidoscopy screening for colorectal cancer
Blom J

Anställningar

Senior Forskare, Klinisk forskning och utbildning, Södersjukhuset, Karolinska Institutet, 2024-2027
Senior Forskare, Medicinsk epidemiologi och biostatistik, Karolinska Institutet, 2023-2026

Examina och utbildning

Docent, kirurgi, Karolinska Institutet, 2018
MEDICINE DOKTORSEXAMEN, Institutionen för klinisk vetenskap, intervention och teknik, Karolinska Institutet, 2007
LICENTIATEXAMEN, Institutionen för klinisk forskning o utbildning, Södersjukhuset, Karolinska Institutet, 2004

Artiklar

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Anställningar

Examina och utbildning

Nyheter från KI

Kalenderhändelser från KI