Evidence map›Paper›PMID 31558459›Full record

ArticleBMJ open2019

Development and validation of multivariable clinical diagnostic models to identify type 1 diabetes requiring rapid insulin therapy in adults aged 18-50 years.

Anita Lynam, Timothy McDonald, Anita Hill, John Dennis, Richard Oram, Ewan Pearson, Michael Weedon, Andrew Hattersley, Katharine Owen, Beverley Shields and 1 more

Abstract readValidation Study
In one paragraph

Article in BMJ open, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing 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

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

  1. Pooled it
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  12. Actionability of Genetic Variants in Diabetes: Core Aspects and Applied Examples.Diabetes spectrum : a publication of the American Diabetes Association · 2025
    Article
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  17. Diabetes Study of Children of Diverse Ethnicity and Race: Study design.Diabetes/metabolism research and reviews · 2024
    Observational
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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

11 authors.

Anita LynamThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.ORCID 0000-0001-7732-0211
Timothy McDonaldThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Anita HillThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
John DennisThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Richard OramThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Ewan PearsonMolecular and Clinical Medicine, University of Dundee, Dundee, UK.
Michael WeedonThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Andrew HattersleyThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Katharine OwenOxford Centre for Diabetes Endocrinology and Metabolism, University of Oxford, Oxford, UK.
Beverley ShieldsThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK.
Angus JonesThe Institute of Biomedical & Clinical Science, University of Exeter Medical School, Exeter, UK Angus.Jones@exeter.ac.uk.ORCID 0000-0002-0883-7599

Funding

Medical Research Council MC_PC_15047Medical Research Council MR/N00633X/Wellcome Trust 102820/Z/13/Z
6 · The paper itself

Abstract

objectiveTo develop and validate multivariable clinical diagnostic models to assist distinguishing between type 1 and type 2 diabetes in adults aged 18-50.

designMultivariable logistic regression analysis was used to develop classification models integrating five pre-specified predictor variables, including clinical features (age of diagnosis, body mass index) and clinical biomarkers (GADA and Islet Antigen 2 islet autoantibodies, Type 1 Diabetes Genetic Risk Score), to identify type 1 diabetes with rapid insulin requirement using data from existing cohorts.

settingUK cohorts recruited from primary and secondary care.

participants1352 (model development) and 582 (external validation) participants diagnosed with diabetes between the age of 18 and 50 years of white European origin.

main outcome measuresType 1 diabetes was defined by rapid insulin requirement (within 3 years of diagnosis) and severe endogenous insulin deficiency (C-peptide <200 pmol/L). Type 2 diabetes was defined by either a lack of rapid insulin requirement or, where insulin treated within 3 years, retained endogenous insulin secretion (C-peptide >600 pmol/L at ≥5 years diabetes duration). Model performance was assessed using area under the receiver operating characteristic curve (ROC AUC), and internal and external validation.

resultsType 1 diabetes was present in 13% of participants in the development cohort. All five predictor variables were discriminative and independent predictors of type 1 diabetes (p<0.001 for all) with individual ROC AUC ranging from 0.82 to 0.85. Model performance was high: ROC AUC range 0.90 (95% CI 0.88 to 0.93) (clinical features only) to 0.97 (95% CI 0.96 to 0.98) (all predictors) with low prediction error. Results were consistent in external validation (clinical features and GADA ROC AUC 0.93 (0.90 to 0.96)).

conclusionsClinical diagnostic models integrating clinical features with biomarkers have high accuracy for identifying type 1 diabetes with rapid insulin requirement, and could assist clinicians and researchers in accurately identifying patients with type 1 diabetes.

Indexed as

Models, BiologicalAdolescentAdultArea Under CurveAutoantibodiesBody Mass IndexCohort StudiesC-Reactive ProteinDiabetes Mellitus, Type 1Diabetes Mellitus, Type 2FemaleGenetic Predisposition to DiseaseGlutamate DecarboxylaseHumansInsulinMaleAutoantibodiesC-Reactive ProteinGlutamate DecarboxylaseInsulinClassificationC-peptideGADAIA-2AType 1 diabetesType 1 Diabetes Genetic Risk ScoreType 2 diabetes

Identifiers

PMID31558459
PMCPMC6773323

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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.