Publications by authors named "Helsingen L"

Background: The Norwegian Directorate of Health produces national clinical guidelines for the health service, and the development of guidelines must follow international standards for trustworthy clinical practice. We investigated whether the standards are being adhered to.

Material And Method: We used the National Guideline Clearinghouse Extent Adherence to Trustworthy Standards Instrument (NEATS) as the scoring tool and assessed a randomly selected chapter from national clinical guidelines that were published or updated during the period 2013 to January 2022.

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Article Synopsis
  • A study was conducted to examine whether cancer screening tests actually improve longevity, focusing on life-years gained from such screenings compared to no screening.
  • The analysis reviewed data from randomized clinical trials that included over 2 million participants and compared various common screening methods for cancers like breast, colorectal, lung, and prostate.
  • Results showed varied follow-up durations across tests, but the key takeaway was that the real benefit in terms of added lifetime from these screenings remains unclear.
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Objectives: To explore guideline panelists' understanding of panel surveys for eliciting panels' inferences regarding patient values and preferences, and the influence of the surveys on making recommendations.

Study Design And Setting: We performed sampling and data collection from all four guideline panels that had conducted the surveys through October 2020. We collected the records of all panel meetings and interviewed some panelists in different roles.

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Objective: Universally acknowledged standards for trustworthy guidelines include the necessity to ground recommendations in patient values and preferences. When information is limited-which is typically the case-guideline panels often find it difficult to explicitly integrate patient values and preferences into their recommendations. Our objective was to develop and evaluate a framework for systematically navigating guideline panels in incorporating patient values and preferences in making recommendations.

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Background & Aims: Because post-polypectomy surveillance uses a growing proportion of colonoscopy capacity, more targeted surveillance is warranted. We therefore compared surveillance burden and cancer detection using 3 different adenoma classification systems.

Methods: In a case-cohort study among individuals who had adenomas removed between 1993 and 2007, we included 675 individuals with colorectal cancer (cases) diagnosed a median of 5.

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Article Synopsis
  • The study aims to assess the risk of non-Hodgkin's lymphoma (NHL) and Hodgkin's lymphoma (HL) in patients diagnosed with inflammatory bowel disease (IBD) in Norway and Sweden from 1987 to 2016.
  • Analyzing data from over 131,000 IBD patients, researchers found a slightly elevated risk for NHL and HL, particularly in those with ulcerative colitis, Crohn's disease, or those undergoing specific treatments like thiopurines and anti-TNF-α.
  • While the statistical risk for developing these lymphomas in IBD patients is significantly higher than the general population, the overall absolute risk remains low, indicating that not all IBD patients will develop lymphoma.
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In this correspondence we respond to critique of our randomized trial of Covid-19 transmission in fitness centers. The trial was performed in Norway during May and June 2020.

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Background: Uncertainty prevails about the magnitude of excess risk of small bowel cancer in patients with inflammatory bowel disease (IBD).

Patients And Methods: To quantify the risk of small bowel adenocarcinoma and neuroendocrine tumors in patients with ulcerative colitis (UC) and Crohn's disease (CD), we undertook a population-based cohort study of all patients with IBD diagnosed in Norway and Sweden from 1987 to 2016. Patients were followed through linkage to national registers.

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Background: There is continued uncertainty regarding the risks of hepato-pancreato-biliary cancers in patients with inflammatory bowel disease (IBD) with or without concomitant primary sclerosing cholangitis (PSC).

Objective: To give updated estimates on risk of hepato-pancreato-biliary cancers in patients with IBD, including pancreatic cancer, hepatocellular carcinoma, gall bladder cancer, and intra - and extrahepatic cholangiocarcinoma.

Methods: In a population-based cohort study, we included all patients diagnosed with IBD in Norway and Sweden from 1987 to 2016.

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Colorectal Cancer ScreeningScreening for colorectal cancer is widespread and successful but screening programs across the globe differ in their recommendations. In this article, Helsingen and Kalager review the evidence for different approaches to colorectal cancer screening and propose a framework for the evaluation of screening programs going forward.

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Background: Closed fitness centers during the Covid-19 pandemic may negatively impact health and wellbeing. We assessed whether training at fitness centers increases the risk of SARS-CoV-2 virus infection.

Methods: In a two-group parallel randomized controlled trial, fitness center members aged 18 to 64 without Covid-19-relevant comorbidities, were randomized to access to training at a fitness center or no-access.

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Background: Women and men with colorectal adenomas are at increased risk of colorectal cancer and colonoscopic surveillance is recommended. However, the long-term cancer risk remains unknown.

Aims: To investigate colorectal cancer incidence and mortality after adenoma removal in women and men METHODS: We identified all individuals who had adenomas removed in Norway from 1993 to 2007, with follow-up through 2018.

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Norway and Sweden are similar countries in terms of socioeconomics and health care. Norway implemented extensive COVID-19 measures, such as school closures and lockdowns, whereas Sweden did not. To compare mortality in Norway and Sweden, two similar countries with very different mitigation measures against COVID-19.

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During the COVID-19 pandemic, the need for rapid legal interventions to protect public health has challenged standards of evidence generation and implementation. Investigators have generated high-quality evidence for drugs and vaccines at remarkable speed, but COVID-19 mitigation measures enforced by laws and regulations remain guided by the precautionary principle rather than by empirical evidence. This article discusses new concepts for embedded evidence generation for legal public health interventions in times of crisis.

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Background: There is considerable heterogeneity in individuals' risk of disease and thus the absolute benefits and harms of population-wide screening programmes. Using colorectal cancer (CRC) screening as an exemplar, we explored how people make decisions about screening when presented with information about absolute benefits and harms, and how those preferences vary with baseline risk, between screening tests and between individuals.

Method: We conducted two linked studies with members of the public: a think-aloud study exploring decision making in-depth and an online randomised experiment quantifying preferences.

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Objectives: Cancer screening guidelines differ in their recommendations for or against screening. To be able to provide explicit recommendations, guidelines need to specify thresholds for the magnitude of benefits of screening, given its harms and burdens. We evaluated how current cancer screening guidelines address the relative importance of benefits versus harms and burdens of screening.

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Context And Objective: Standards for clinical practice guidelines require explicit statements regarding how values and preferences influence recommendations. However, no cancer screening guideline has addressed the key question of what magnitude of benefit people require to undergo screening, given its harms and burdens. This article describes the development of a new method for guideline developers to address this key question in the absence of high-quality evidence from published literature.

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Background: Norway and Sweden have similar populations and health care systems, but different reactions to the COVID-19 pandemic. Norway closed educational institutions, and banned sports and cultural activities; Sweden kept most institutions and training facilities open. We aimed to compare peoples' attitudes towards authorities and control measures, and perceived impact of the pandemic and implemented control measures on life in Norway and Sweden.

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The following recommendations for post-polypectomy colonoscopic surveillance apply to all patients who had one or more polyps that were completely removed during a high quality baseline colonoscopy. 1: ESGE recommends that patients with complete removal of 1 - 4 < 10 mm adenomas with low grade dysplasia, irrespective of villous components, or any serrated polyp < 10 mm without dysplasia, do not require endoscopic surveillance and should be returned to screening.Strong recommendation, moderate quality evidence.

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Objective: Evaluate effectiveness, harms and burdens of faecal blood testing, sigmoidoscopy and colonoscopy screening for colorectal cancer over 15 years.

Design: We performed an update of a Cochrane systematic review, and performed network meta-analysis comparing randomised trials evaluating colorectal cancer screening with guaiac faecal occult blood test (gFOBT) (annual, biennial), faecal immunochemical test (FIT) (annual, biennial), sigmoidoscopy (once-only) or colonoscopy (once-only) in a healthy population, aged 50-79 years. We conducted subgroup analysis on sex.

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Clinical Question: Recent 15-year updates of sigmoidoscopy screening trials provide new evidence on the effectiveness of colorectal cancer screening. Prompted by the new evidence, we asked: "Does colorectal cancer screening make an important difference to health outcomes in individuals initiating screening at age 50 to 79? And which screening option is best?"

Current Practice: Numerous guidelines recommend screening, but vary on recommended test, age and screening frequency. This guideline looks at the evidence and makes recommendations on screening for four screening options: faecal immunochemical test (FIT) every year, FIT every two years, a single sigmoidoscopy, or a single colonoscopy.

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