Evidence map›Paper›PMID 32213041›Full record

Observational studyUnited European gastroenterology journal2020

Faecal haemoglobin can define risk of colorectal neoplasia at surveillance colonoscopy in patients at increased risk of colorectal cancer.

Jayne Digby, Shirley Cleary, Lynne Gray, Pooja Datt, David R Goudie, Robert J C Steele, Judith A Strachan, Adam Humphries, Callum G Fraser, Craig Mowat

Abstract readObservational Study
In one paragraph

Observational study in United European gastroenterology journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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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

10 authors.

Jayne DigbyCentre for Research into Cancer Prevention and Screening, University of Dundee, Dundee, Scotland, UK.
Shirley ClearyDepartment of Gastroenterology, Ninewells Hospital and Medical School, Dundee, Scotland, UK.
Lynne GrayDepartment of Surgery, Ninewells Hospital and Medical School, Dundee, Scotland, UK.
Pooja DattDepartment of Gastroenterology, St. Mark's Hospital and Imperial College, London, UK.
David R GoudieDepartment of Clinical Genetics, Ninewells Hospital and Medical School, Dundee, Scotland, UK.
Robert J C SteeleCentre for Research into Cancer Prevention and Screening, University of Dundee, Dundee, Scotland, UK.
Judith A StrachanDepartment of Blood Sciences, Ninewells Hospital and Medical School, Dundee, Scotland, UK.
Adam HumphriesDepartment of Gastroenterology, St. Mark's Hospital and Imperial College, London, UK.
Callum G FraserCentre for Research into Cancer Prevention and Screening, University of Dundee, Dundee, Scotland, UK.ORCID 0000-0002-1333-7994
Craig MowatDepartment of Gastroenterology, Ninewells Hospital and Medical School, Dundee, Scotland, UK.ORCID 0000-0002-5021-415X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundQuantitative faecal immunochemical tests measure faecal haemoglobin concentration (f-Hb), which increases in the presence of colorectal neoplasia.

objectiveWe examined the diagnostic accuracy of faecal immunochemical test (FIT)in patients at increased risk of colorectal cancer (CRC) attending for surveillance colonoscopy as per national guidelines.

methodsA total of 1103 consecutive patients were prospectively invited to complete a FIT before their scheduled colonoscopy in two university hospitals in 2014- 2016. F-Hb was analysed on an OC-Sensor io automated analyser (Eiken Chemical Co., Ltd, Tokyo, Japan) with a limit of detection of 2 µg Hb/g faeces. The diagnostic accuracy of f-Hb for CRC and higher-risk adenoma was examined.

resultsA total of 643 patients returned a faecal test. After excluding 4 patients with known inflammatory bowel disease, 639 (57.9%) remained in the study: age range: 25-90 years (median: 64 years, interquartile range (IQR): 55-71): 54.6% male. Of 593 patients who also completed colonoscopy, 41 (6.9%) had advanced neoplasia (4 CRC, 37 higher-risk adenoma). Of the 238 patients (40.1%) who had detectable f-Hb, 31 (13.0%) had advanced neoplasia (2 CRC, 29 higher-risk adenoma) compared with 10 (2.8%) in those with undetectable f-Hb (2 CRC, 8 higher-risk adenoma). Detectable f-Hb gave negative predictive values of 99.4% for CRC and 97.2% for CRC plus higher-risk adenoma.

conclusionIn patients at increased risk of CRC under colonoscopy surveillance, a test measuring faecal haemoglobin can provide an objective estimate of the risk of advanced neoplasia, and could enable tailored scheduling of colonoscopy.

Indexed as

AdenomaAdultAgedAged, 80 and overColonoscopyColorectal NeoplasmsEarly Detection of CancerFeasibility StudiesFemaleHemoglobinsHumansMaleMiddle AgedOccult BloodPredictive Value of TestsProspective StudiesHemoglobinsAdenomacolonoscopycolorectal neoplasmsfaecal haemoglobinfaecal immunochemical testsurveillance

Identifiers

PMID32213041
PMCPMC7268942

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Registered trials

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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.