Cited by 3,267Meta-analysis and systematic reviewsStatistical Methods in EpidemiologyClinical practice guidelines implementation

Transparent Reporting of a multivariable prediction model for Individual Prognosis Or Diagnosis (TRIPOD): The TRIPOD Statement

Open access
Collins, Gary S., Reitsma, Johannes B., Altman, Douglas G., Moons, Karel G.M.·2015·Annals of Internal Medicine

Abstract

Prediction models are developed to aid health care providers in estimating the probability or risk that a specific disease or condition is present (diagnostic models) or that a specific event will occur in the future (prognostic models), to inform their decision making. However, the overwhelming evidence shows that the quality of reporting of prediction model studies is poor. Only with full and clear reporting of information on all aspects of a prediction model can risk of bias and potential usefulness of prediction models be adequately assessed. The Transparent Reporting of a multivariable prediction model for Individual Prognosis Or Diagnosis (TRIPOD) Initiative developed a set of recommendations for the reporting of studies developing, validating, or updating a prediction model, whether for diagnostic or prognostic purposes. This article describes how the TRIPOD Statement was developed. An extensive list of items based on a review of the literature was created, which was reduced after a Web-based survey and revised during a 3-day meeting in June 2011 with methodologists, health care professionals, and journal editors. The list was refined during several meetings of the steering group and in e-mail discussions with the wider group of TRIPOD contributors. The resulting TRIPOD Statement is a checklist of 22 items, deemed essential for transparent reporting of a prediction model study. The TRIPOD Statement aims to improve the transparency of the reporting of a prediction model study regardless of the study methods used. The TRIPOD Statement is best used in conjunction with the TRIPOD explanation and elaboration document. To aid the editorial process and readers of prediction model studies, it is recommended that authors include a completed checklist in their submission (also available at www.tripod-statement.org).

Integrity signals

Registry

Crossref · 10.7326/m14-0697

Cites

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Statistics

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Claims the paper makes

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  • Findingcitation

    TRIPOD excludes impact studies that measure how using a model affects behavior, health outcomes, or cost-effectiveness.

    “Furthermore, TRIPOD is also not intended for impact studies that quantify the impact of using a prediction model on participant or doctors' behavior and management, participant health outcomes, or cost-effectiveness of care, compared with not using the model (13,38).”
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  • Premisecitation

    Probability estimates in diagnostic and prognostic contexts seldom rest on one predictor alone.

    “In both the diagnostic and prognostic setting, estimates of probabilities are rarely based on a single pre-dictor (5).”
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  • Premisecitation

    A substantial number of prediction model studies have weak methodology.

    “because many such studies are methodologically weak, we also summarize the qualities of good (and the limitations of less good) studies, regardless of reporting (43).”
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  • Premisecitation

    Overfitting, optimism, and miscalibration can be addressed during model development by shrinkage or penalization.

    “Overfitting, optimism, and miscalibration may also be addressed and accounted for during the model development by applying shrinkage (for example, heuristic or based on bootstrapping techniques) or penalization procedures (for example, ridge regression or lasso) (20).”
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  • Premisecitation

    Very few prediction models, relative to the large number published, are widely implemented or used in clinical practice.

    “very few prediction models, relative to the large number of models published, are widely implemented or used in clinical practice (6).”
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    Findingcitation

    TRIPOD does not cover etiologic multivariable modeling or studies of single prognostic factors.

    “TRIPOD is not intended for multivariable modeling in etiologic studies or for studies investigating single prognostic factors (37).”
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  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingcitation

    The accompanying explanation and elaboration document describes every checklist item and gives examples of good reporting.

    “Each checklist item is explained and accompanied by examples of good reporting from published articles.”
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    Findingnone given

    TRIPOD gives greater weight to validation studies and what must be reported for them.

    “TRIPOD also places much more emphasis on validation studies and the reporting requirements for such studies.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Findingreasoning

    TRIPOD is not meant to serve as an instrument for judging the quality of a prediction model.

    “Furthermore, the checklist is not a quality assessment tool to gauge the quality of a multivariable prediction model.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Findingreasoning

    TRIPOD offers reporting guidance only; it does not dictate how a prediction model should be derived or validated.

    “The recommendations within TRIPOD are guidelines only for reporting research and do not prescribe how to develop or validate a prediction model.”
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    Findingcitation

    Studies that assess whether a new predictor adds value over known predictors or existing models fall within TRIPOD's scope.

    “The reporting of studies evaluating the incremental value of specific predictors, beyond established predictors or even beyond existing prediction models (18,42), also fits entirely within the remit of TRIPOD”
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    Findingreasoning

    TRIPOD consists of 22 checklist items that its authors regard as necessary for adequate reporting of prediction model derivation or validation studies.

    “The TRIPOD Statement is a checklist of 22 items that we consider essential for good reporting of studies developing or validating multivariable prediction models (Table).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingcitation

    The E&E document also reviews what makes studies good and what limits weaker studies, independent of reporting quality.

    “we also summarize the qualities of good (and the limitations of less good) studies, regardless of reporting (43).”
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    Premisecitation

    Model development requires internal validation.

    “Internal validation is a necessary part of model development (2).”
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    Study design and conductreasoning

    Where possible, TRIPOD's recommendations were aligned with other reporting guidelines.

    “While making revisions, conscious efforts were made to harmonize our recommendations with other reporting guidelines, and where possible we chose the same or similar wording for items (37,39,41,45,46).”
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    Premisecitation

    Clinical practice guidelines increasingly advise using prediction models, according to health care providers and policy makers.

    “Health care providers and policy makers are increasingly recommending the use of prediction models within clinical practice guidelines to inform decision making at various stages in the clinical pathway (30,31).”
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    Study design and conductreasoning

    Existing systematic reviews provided an extensive evidence base to justify the inclusion and illustration of each checklist item.

    “A comprehensive evidence base from existing systematic reviews of prediction models was used to support and justify the rationale for including and illustrating each checklist item.”
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    Interpretationreasoning

    Prediction is inherently multivariable.

    “Prediction is therefore inherently multivariable.”
    Quote in the paperNot a substantial claim
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    Interpretationreasoning

    Clear reporting of the essential steps used to derive and validate a prediction model is necessary for synthesis and critical appraisal.

    “It is therefore essential that key details of how a prediction model was developed and validated be clearly reported to enable synthesis and critical appraisal of all relevant information (14,(33)(34)(35)(36).”
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  • May combine two claims.

    Premisereasoning

    Although STROBE, REMARK, STARD, and GRIPS include many items relevant to prediction model studies, no existing guideline is fully suitable for them.

    “studies all contain many items that are relevant to studies developing or validating prediction models.However, none of these guidelines are entirely appropriate for prediction model studies.”
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    Premisecitation

    Reviews have commonly found serious deficiencies in statistical methods, small datasets, missing data handling, and lack of validation.

    “these reviews have shown that serious deficiencies in the statistical methods, use of small data sets, inappropriate handling of missing data, and lack of validation are common (6,(23)(24)(25)(26)(27)29).”
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  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductown data

    At the three-day meeting, all 76 candidate items were discussed one by one, and the group agreed whether to keep, combine, or drop each.

    “During the 3-day meeting, each of the 76 candidate checklist items was discussed in turn, and a consensus was reached on whether to retain, merge with another item, or omit the item.”
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    Premisereasoning

    Diagnostic and prognostic prediction models share the same challenges, including predictor selection, model-building strategies, handling continuous predictors, and overfitting.

    “The same challenges as when developing a multivariable prediction model, such as selection of the predictors, model-building strategies, and handling of continuous predictors and the danger of overfitting.”
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    Study design and conductreasoning

    Development of TRIPOD followed published guidance for reporting guidelines and involved a systematic literature search, an online expert survey, and a three-day consensus meeting.

    “We followed published guidance for developing reporting guidelines (44) and established a steering committee (Drs.Collins, Reitsma, Altman, and Moons) to organize and coordinate the development of TRIPOD.”
    • Also stated in: § DEVELOPING THE TRIPOD STATEMENT · plain
      “The results of the survey were presented at a 3-day meeting in June 2011, in Oxford, United Kingdom; it was attended by 24 of the 25 invited participants (22 of whom had participated in the survey).”
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    Premisecitation

    REMARK focuses primarily on prognostic factors rather than prediction models, and GRIPS targets genetic risk prediction and issues with many genetic variants.

    “the focus of the REMARK checklist is primarily on prognostic factors and not prediction models, whereas the GRIPS statement is aimed at risk prediction using genetic risk factors and the specific methodological issues around handling large numbers of genetic variants.”
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    Interpretationreasoning

    These methodological problems result in models that either cannot be used or ought not to be used.

    “Such deficiencies ultimately lead to prediction models that are not or should not be used.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    Diagnostic and prognostic prediction models use the same measures for assessing model performance.

    “The same measures for assessing model performance.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    The funding sources played no role in the study design, data collection, analysis, manuscript preparation, or the decision to submit the manuscript for publication.

    “The funding sources had no role in the study design, data collection, analysis, preparation of the manuscript, or decision to submit the manuscript for publication.”
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  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    After the meeting, the steering committee revised the checklist in multiple face-to-face meetings and sent it to participants so that it matched their discussions.

    “After the meeting, the checklist was revised by the steering committee during numerous face-to-face meetings, and circulated to the participants to ensure it reflected the discussions.”
    Quote in the paperNot a substantial claim
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    Premisecitation

    Research reporting generally requires that others be able to repeat every step and get identical results.

    “It is a general requirement of reporting of research that other researchers can, if required, replicate all the steps taken and obtain the same results (32).”
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    Interpretationreasoning

    Adequate assessment of a prediction model's risk of bias and potential usefulness requires complete and clear reporting of every aspect of the model.

    “Only with full and clear reporting of information on all aspects of a prediction model can risk of bias and potential usefulness of prediction models be adequately assessed.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisereasoning

    Diagnostic prediction concerns a cross-sectional relationship, while prognostic prediction concerns a longitudinal relationship.

    “in diagnostic prediction the interest is in principle a cross-sectional relationship, whereas prognostic prediction involves a longitudinal relationship.”
    Quote in the paperNot a substantial claim
27 of 27
  • The paper relies on this without support.

    The number of prediction models in medicine has grown rapidly in recent years.

    “Prediction models in medicine have proliferated in recent years.”
1 of 1

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Authors
Collins, G. S., Reitsma, J. B., Altman, D. G., & Moons, K. G. M.
Affiliations
  • From Centre for Statistics in Medicine, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, Botnar Research Centre, University of Oxford, Oxford, United Kingdom, and Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands.
  • University Medical Center Utrecht (NL)
Venue
Annals of Internal Medicine
Published
2015-01-06
Volume
162
Issue
1
Pages
55-63
ISSN
  • 0003-4819 (ISSN-L)
  • 1539-3704
OpenAlex
W2078271269
Cited by
3,267
References
69
Citations by year
2026: 736 · 2025: 292 · 2024: 342 · 2023: 356 · 2022: 326 · 2021: 341 · 2020: 268 · 2019: 187 · 2018: 155 · 2017: 123 · 2016: 81 · 2015: 59 · 2012: 1
FWCI
125.67
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Annals of Internal Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (publishedVersion)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
Funders
  • Vanderbilt University
  • Memorial Sloan-Kettering Cancer Center
  • Cleveland Clinic
  • University of Ottawa
  • Cancer Research UK (16895, C5529)
  • National Institute for Health and Care Research (NF-SI-0508-10259, NF-SI-0513-10131)
  • University College London
  • University of Oxford
  • Universiteit Maastricht
  • Albert-Ludwigs-Universität Freiburg
  • University of North Carolina at Chapel Hill
  • Medical Research Council
Topics
  • Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Epidemiology
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Clinical practice guidelines implementation
Keywords
TRIPOD statement, multivariable prediction models, prognostic model, diagnostic model, reporting quality, reporting checklist, risk of bias, prediction model validation, clinical decision-making
MeSH terms
Decision Support Techniques, Diagnosis, Humans, Prognosis, Publishing, Models, Statistical, Multivariate Analysis, Checklist

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