Evidence map›Paper›PMID 31722908›Full record

SynthesisCanadian family physician Medecin de famille canadien2019

Colorectal cancer screening for patients with a family history of colorectal cancer or adenomas.

Anna N Wilkinson, David Lieberman, Grigorios I Leontiadis, Frances Tse, Alan N Barkun, Ahmed Abou-Setta, John K Marshall, Jewel Samadder, Harminder Singh, Jennifer J Telford and 2 more

Registry-linked trialAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Canadian family physician Medecin de famille canadien, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06242197 (Comparing the Effectiveness of Written Advice VS. Standard Verbal Advice in Transferring Knowledge to First Degree Relatives of Colorectal Cancer Patients), which is not on this map. Cited by 22 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 3 pooled it
1.1field-weighted citation impact, top 20% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT06242197 nacompletednot on this mapstarted 2022, after this paper: background citation

Comparing the Effectiveness of Written Advice VS. Standard Verbal Advice in Transferring Knowledge to First Degree Relatives of Colorectal Cancer Patients

TypeinterventionalSponsorRamathibodi HospitalRan2022 to 2024Enrolled180ConditionsColorectal CancerArmswritten advice
3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 3 syntheses or guidelines pooled it, 28 citations in OpenAlex.

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  11. Early Onset Colorectal Cancer: Molecular Underpinnings Accelerating Occurrence.Cellular and molecular gastroenterology and hepatology · 2025
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

12 authors at 11 institutions in 3 countries.

Anna N WilkinsonAssistant Professor in the Department of Family Medicine and the Department of Oncology and Program Director of the third-year family physician oncology program at the University of Ottawa in Ontario. anwilkinson@toh.ca.
David LiebermanProfessor of Medicine and Chief of the Division of Gastroenterology and Hepatology at Oregon Health and Science University in Portland.
Grigorios I LeontiadisAssociate Professor in the Division of Gastroenterology at McMaster University Health Sciences Centre in Hamilton, Ont.
Frances TseAssociate Professor and Chief of Service, Gastroenterology, in the Division of Gastroenterology at McMaster University.
Alan N BarkunChairholder of the Douglas G. Kinnear Chair in Gastroenterology and Professor of Medicine, Director of the Endoscopy and Therapeutic Endoscopy Training Program, and Chief Quality Officer in the Division of Gastroenterology at McGill University and the McGill University Health Centre in Montreal, Que.
Ahmed Abou-SettaDirector of the Knowledge Synthesis platform at the George and Fay Yee Centre for Healthcare Innovation at the University of Manitoba in Winnipeg.
John K MarshallProfessor of Medicine and Director of the Division of Gastroenterology at McMaster University.
Jewel SamadderAssociate Professor and Director of the High Risk Cancer Clinic in the Division of Gastroenterology and Hepatology at the Mayo Clinic in Phoenix, Ariz.
Harminder SinghAssociate Professor in the Department of Internal Medicine and the Department of Community Health Sciences at the University of Manitoba and in the Department of Hematology and Oncology of CancerCare Manitoba.
Jennifer J TelfordClinical Professor of Medicine at the University of British Columbia in Vancouver and Medical Director of the BC Colon Screening Program at Pacific Gastroenterology Associates.
Jill TinmouthAssistant Professor in the Department of Medicine at the University of Toronto in Ontario, Scientist in Evaluative Clinical Sciences in the Odette Cancer Research Program at the Sunnybrook Research Institute, a staff physician at Sunnybrook Health Sciences Centre, Adjunct Scientist at ICES, a faculty member of the Institute of Health Policy, Management and Evaluation at the University of Toronto, and Lead Scientist of the ColonCancerCheck program at Cancer Care Ontario.
Desmond LeddinAdjunct Professor of Medicine at the University of Limerick in Ireland and at Dalhousie University in Halifax, NS, and Head of Graduate Entry Medical School at the University of Limerick.
McMaster University · CACancerCare Manitoba · CACollege of Family Physicians of Canada · CAGeorge & Fay Yee Centre for Healthcare Innovation · CAMayo Clinic in Arizona · USMcGill University Health Centre · CAMcMaster University Medical Centre · CAOregon Health & Science University · USSunnybrook Health Science Centre · CAUniversity of British Columbia · CAUniversity of Limerick · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo review and summarize the recently developed Canadian Association of Gastroenterology screening recommendations for patients with a family history of colorectal cancer (CRC) or adenoma from a family medicine perspective. QUALITY OF EVIDENCE: A systematic review and meta-analysis was performed to synthesize knowledge regarding family history and CRC. The Cochrane Central Register of Controlled Trials, MEDLINE, and EMBASE were searched with the following MeSH terms: MAIN MESSAGE: Individuals who have 1 first-degree relative (FDR) with CRC or an advanced adenoma diagnosed at any age are recommended to undergo colonoscopy every 5 to 10 years starting at age 40 to 50 years or 10 years younger than the age at diagnosis of the FDR, although fecal immunochemical testing at an interval of every 1 to 2 years can be used. Individuals with FDRs with non-advanced adenomas or a history of CRC in second-degree relatives should be screened according to average-risk guidelines. Lifestyle modification can statistically significantly decrease risk of CRC and should be considered in all patients.

conclusionThese guidelines acknowledge the many factors that can increase an individual's risk of developing CRC and allow for judgment to be employed depending on the clinical scenario. Lifestyle advice already given to patients for weight, blood pressure, and heart disease management will reduce the risk of CRC if implemented, and this combined with more targeted screening for higher-risk individuals will hopefully be successful in decreasing CRC mortality in Canada.

Indexed as

AdenomaAdultCanadaColonoscopyColorectal NeoplasmsEarly Detection of CancerFemaleGenetic Predisposition to DiseaseHumansMaleMedical History TakingMiddle AgedPractice Guidelines as TopicRisk AssessmentRisk Factors

Identifiers

PMID31722908
PMCPMC6853346
OpenAlexW2989559026

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.