Evidence map›Paper›PMID 33999838›Full record

ArticleJournal of medical Internet research2021

A Machine Learning Approach for Mortality Prediction in COVID-19 Pneumonia: Development and Evaluation of the Piacenza Score.

Geza Halasz, Michela Sperti, Matteo Villani, Umberto Michelucci, Piergiuseppe Agostoni, Andrea Biagi, Luca Rossi, Andrea Botti, Chiara Mari, Marco Maccarini and 10 more

Open access · goldAbstract read
In one paragraph

Article in Journal of medical Internet research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 2 pooled it
3.1field-weighted citation impact, top 7% 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.

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

22 citing papers in PubMed, 2 syntheses or guidelines pooled it, 51 citations in OpenAlex.

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  19. Demystifying machine learning for mortality prediction.Critical care (London, England) · 2021
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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

20 authors at 5 institutions in 2 countries.

Geza Halasz *Department of Cardiology, Guglielmo Da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0001-7220-123X
Michela Sperti *PolitoBIOMed Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy.ORCID 0000-0003-0756-8523
Matteo VillaniAnesthesiology and ICU Department, Guglielmo da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0003-4269-6096
Umberto MichelucciTOELT LLC - AI Research and Development, Dubendorf, Switzerland.ORCID 0000-0002-6060-5365
Piergiuseppe AgostoniDepartment of Clinical Sciences and Community Health, Centro Cardiologico Monzino, Istituto di Ricovero e Cura a Carattere Scientifico, Milano, Italy.ORCID 0000-0002-8345-6382
Andrea BiagiDepartment of Cardiology, Guglielmo Da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0002-8792-3523
Luca RossiDepartment of Cardiology, Guglielmo Da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0003-3288-9134
Andrea BottiDepartment of Clinical and Experimental Medicine, University of Parma, Parma, Italy.ORCID 0000-0003-1305-4107
Chiara MariDepartment of Clinical and Experimental Medicine, University of Parma, Parma, Italy.ORCID 0000-0001-9874-1859
Marco MaccariniDalle Molle Institute for Artificial Intelligence, Università della Svizzera italiana/Scuola universitaria professionale della Svizzera italiana, Lugano, Switzerland.ORCID 0000-0002-9081-7377
Filippo PuraDalle Molle Institute for Artificial Intelligence, Università della Svizzera italiana/Scuola universitaria professionale della Svizzera italiana, Lugano, Switzerland.ORCID 0000-0002-6300-2885
Loris RovedaDalle Molle Institute for Artificial Intelligence, Università della Svizzera italiana/Scuola universitaria professionale della Svizzera italiana, Lugano, Switzerland.ORCID 0000-0002-4427-536X
Alessia NardecchiaIstituto Istruzione Superiore, Casalpusterlengo, Italy.ORCID 0000-0001-9728-2099
Emanuele Mottola7HC SRL, Rome, Italy.ORCID 0000-0001-6727-7731
Massimo NolliAnesthesiology and ICU Department, Guglielmo da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0002-9890-1290
Elisabetta SalvioniDepartment of Clinical Sciences and Community Health, Centro Cardiologico Monzino, Istituto di Ricovero e Cura a Carattere Scientifico, Milano, Italy.ORCID 0000-0002-8448-7551
Massimo MapelliDepartment of Clinical Sciences and Community Health, Centro Cardiologico Monzino, Istituto di Ricovero e Cura a Carattere Scientifico, Milano, Italy.ORCID 0000-0001-9985-7407
Marco Agostino DeriuPolitoBIOMed Lab, Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Torino, Italy.ORCID 0000-0003-1918-1772
Dario PigaDalle Molle Institute for Artificial Intelligence, Università della Svizzera italiana/Scuola universitaria professionale della Svizzera italiana, Lugano, Switzerland.ORCID 0000-0001-7691-4886
Massimo PiepoliDepartment of Cardiology, Guglielmo Da Saliceto Hospital, Piacenza, Italy.ORCID 0000-0003-1124-234X
Guglielmo da Saliceto Hospital · ITUniversità della Svizzera italiana · CHCentro Cardiologico Monzino · ITPolitecnico di Torino · ITUniversity of Parma · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSeveral models have been developed to predict mortality in patients with COVID-19 pneumonia, but only a few have demonstrated enough discriminatory capacity. Machine learning algorithms represent a novel approach for the data-driven prediction of clinical outcomes with advantages over statistical modeling.

objectiveWe aimed to develop a machine learning-based score-the Piacenza score-for 30-day mortality prediction in patients with COVID-19 pneumonia.

methodsThe study comprised 852 patients with COVID-19 pneumonia, admitted to the Guglielmo da Saliceto Hospital in Italy from February to November 2020. Patients' medical history, demographics, and clinical data were collected using an electronic health record. The overall patient data set was randomly split into derivation and test cohorts. The score was obtained through the naïve Bayes classifier and externally validated on 86 patients admitted to Centro Cardiologico Monzino (Italy) in February 2020. Using a forward-search algorithm, 6 features were identified: age, mean corpuscular hemoglobin concentration, PaO

resultsThe Piacenza score exhibited an area under the receiver operating characteristic curve (AUC) of 0.78 (95% CI 0.74-0.84, Brier score=0.19) in the internal validation cohort and 0.79 (95% CI 0.68-0.89, Brier score=0.16) in the external validation cohort, showing a comparable accuracy with respect to the 4C score and to the naïve Bayes model with a priori chosen features; this achieved an AUC of 0.78 (95% CI 0.73-0.83, Brier score=0.26) and 0.80 (95% CI 0.75-0.86, Brier score=0.17), respectively.

conclusionsOur findings demonstrated that a customizable machine learning-based score with a purely data-driven selection of features is feasible and effective for the prediction of mortality among patients with COVID-19 pneumonia.

Indexed as

Machine LearningBayes TheoremCohort StudiesCOVID-19Electronic Health RecordsFemaleHumansItalyMaleResearch DesignRetrospective StudiesRisk FactorsSARS-CoV-2artificial intelligenceCOVID-19machine learningmodelingmortalitypneumoniapredictionprognostic score

Identifiers

PMID33999838
PMCPMC8168638
OpenAlexW3137754018

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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.