Evidence map›Paper›PMID 28941187›Full record

ArticleCancer medicine2017

Evaluation of a prediction model for colorectal cancer: retrospective analysis of 2.5 million patient records.

Jacqueline Birks, Clare Bankhead, Tim A Holt, Alice Fuller, Julietta Patnick

Abstract read
In one paragraph

Article in Cancer medicine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 6 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

25 citing papers in PubMed, 6 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

5 authors.

Jacqueline BirksOxford Biomedical Research Centre, Oxford University, Botnar Research Institute, Windmill Rd, Oxford, OX7 3LD, United Kingdom.ORCID http://orcid.org/0000-0002-8310-9911
Clare BankheadNuffield Department of Primary Care Health Sciences, Oxford University, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom.ORCID http://orcid.org/0000-0003-1588-3849
Tim A HoltNuffield Department of Primary Care Health Sciences, Oxford University, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom.ORCID http://orcid.org/0000-0002-1214-1682
Alice FullerNuffield Department of Primary Care Health Sciences, Oxford University, Radcliffe Observatory Quarter, Woodstock Road, Oxford, OX2 6GG, United Kingdom.
Julietta PatnickCancer Epidemiology Unit, Nuffield Department of Population Health, Oxford University, Richard Doll Building, Old Road Campus, Oxford, OX3 7LF, United Kingdom.ORCID http://orcid.org/0000-0002-5500-3335

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Earlier detection of colorectal cancer greatly improves prognosis, largely through surgical excision of neoplastic polyps. These include benign adenomas which can transform over time to malignant adenocarcinomas. This progression may be associated with changes in full blood count indices. An existing risk algorithm derived in Israel stratifies individuals according to colorectal cancer risk using full blood count data, but has not been validated in the UK. We undertook a retrospective analysis using the Clinical Practice Research Datalink. Patients aged over 40 with full blood count data were risk-stratified and followed up for a diagnosis of colorectal cancer over a range of time intervals. The primary outcome was the area under the receiver operating characteristic curve for the 18-24-month interval. We also undertook a case-control analysis (matching for age, sex, and year of risk score), and a cohort study of patients undergoing full blood count testing during 2012, to estimate predictive values. We included 2,550,119 patients. The area under the curve for the 18-24-month interval was 0.776 [95% confidence interval (CI): 0.771, 0.781]. Performance improves as the time interval reduces. The area under the curve for the age-matched case-control analysis was 0.583 [0.574, 0.591]. For the population risk-scored in 2012, the positive predictive value at 99.5% specificity was 8.8% with negative predictive value 99.6%. The algorithm offers an additional means of identifying risk of colorectal cancer, and could support other approaches to early detection, including screening and active case finding.

Indexed as

Models, TheoreticalAdultAgedAged, 80 and overAlgorithmsCase-Control StudiesColorectal NeoplasmsElectronic Health RecordsFemaleHumansMachine LearningMaleMiddle AgedPopulation SurveillancePrognosisRetrospective StudiesBlood cell countcolorectal neoplasmsearly detection of cancerelectronic health recordsmachine learningrisk assessment

Identifiers

PMID28941187
PMCPMC5633543

What OpenQuestion holds

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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.