LMLevi Monteiro Martins

Levi Monteiro Martins

*This is an algorithmically generated author record based on publicly available information.

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Levi Monteiro Martins has a total of 7 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Impact of air pollution on hospital admissions : analysis and prediction

    by Levi Monteiro Martins

    Impact de la pollution de l’air sur les admissions hospitalières : analyse et prédiction: La variabilité et la demande croissante de soins hospitaliers, conjuguées à la réduction de la capacité hospitalière disponible, soulignent la nécessité de disposer d’outils précis permettant d’optimiser l’allocation des ressources, la répartition du personnel et la gestion des lits. Anticiper les admissions hospitalières offre aux gestionnaires de santé la possibilité de mieux se préparer aux pics de demande et d’atténuer le risque de surpopulation. De nombreuses études mettent en évidence la capacité de l’apprentissage automatique (Machine Learning, ML) à extraire et structurer de grandes quantités de données complexes et non structurées, offrant ainsi une approche robuste pour l’analyse de données hétérogènes. L’intelligence artificielle (IA), incluant le ML et l’apprentissage profond (Deep Learning, DL), propose des approches prometteuses pour le développement de modèles de prévision. Parmi les facteurs influençant les admissions hospitalières, les déterminants environnementaux tels que la pollution de l’air et les conditions météorologiques figurent parmi les plus influents, en particulier pour les maladies circulatoires et respiratoires. Compte tenu du poids important des maladies circulatoires et respiratoires sur les admissions hospitalières, ainsi que de leur sensibilité aux expositions environnementales, cette thèse vise à évaluer la contribution des expositions environnementales, notamment la pollution de l’air et les conditions météorologiques, à la prévision des admissions hospitalières via les services d’urgence, en se concentrant sur les maladies circulatoires et respiratoires dans la métropole de Lyon. La contribution de cette thèse réside dans la compréhension et l’application du ML à la prévision des admissions hospitalières, avec une attention particulière portée aux prédicteurs environnementaux. Pour ce faire, nous synthétisons les preuves existantes sur les approches de ML utilisées pour la prévision des admissions hospitalières, en identifiant les méthodes employées et les prédicteurs les plus courants. De plus, nous avons analysé les associations entre les expositions environnementales et les admissions hospitalières à Lyon, en actualisant les estimations précédentes et en apportant de nouvelles preuves sur l’impact des facteurs environnementaux. Enfin, nous avons évalué les performances des approches de prévision les plus utilisées, en comparant les modèles de séries temporelles traditionnels, univariés et multivariés, avec les méthodes d’apprentissage automatique.

  • Open Access

    Independent associations of air pollution and weather with hospital admissions for circulatory and respiratory diseases in the Lyon metropolitan area, France (2012–2019): a distributed lag nonlinear analysis

    by Levi Monteiro Martins, Elsa Coz, Celine Piegay, Arnaud Friggeri, Mohand-Saïd Hacid, Delphine Maucort-Boulch

    The impact of air pollution on respiratory and circulatory diseases is a major public health topic. The present study examines the impact of air pollution and weather on hospital admissions for circulatory and respiratory diseases in adults in the Lyon metropolitan area, France. A quasi-Poisson generalized linear model, along with a distributed lag nonlinear model (DLNM), was used to investigate the nonlinear exposure-response relationships of air pollutants and weather variables on daily adult hospital admissions from 2012 to 2019. Subgroup analyses by age, French deprivation index (FDep), and Charlson comorbidity index (CCI) were performed. Based on cumulative effects over the entire lag range, results showed that for respiratory admissions, CO at the 99th percentile was positively associated with overall admissions, and admissions of patients aged $$\ge $$ 65 years, FDep>1, and CCI $$=\{0,1\}$$ . PM10 >75th percentile was negatively associated with overall admissions and admissions of patients aged $$\ge $$ 65, FDep=1 or >1, and CCI $$=\{0,1\}$$ . Ox below the median was positively associated with admissions in patients aged $$\ge $$ 65, and negatively associated at the 75th percentile. Temperature at the 99th percentile was negatively associated with overall admissions, and admissions in patients categorized as FDep=1 and CCI>1. Rainfall at the 99th percentile was negatively associated with admissions in patients categorized as CCI $$=\{0,1\}$$ . For circulatory admissions, only wind speed above the median was positively associated with overall admissions and admissions of patients categorized as FDep=1. Lag-specific associations revealed heterogeneous temporal patterns across exposures and subgroups.

  • Open Access

    Machine learning with environmental predictors to forecast hospital visits and admissions: a systematic review

    by Levi Monteiro Martins, Elsa Coz, Delphine Maucort-Boulch, Mohand-Saïd Hacid


  • Open Access

    Machine Learning with environmental predictors to forecast Hospital Attendances and In-hospital Mortality: a Systematic Review

    by Levi Monteiro Martins, Elsa Coz, Delphine Maucort-Boulch, Mohand-Saïd Hacid

    Many studies have demonstrated a correlation between environmental predictors and hospital attendance, particularly air pollution, a significant risk to health. One important factor that affects air pollution concentration is meteorology. Both factors contribute to an increase in the healthcare demand, which can lead to the global problem of Emergency Department Crowding. To address this problem, forecasting models are essential in resources allocation and general management to improve patient outcomes. Machine Learning (ML), especially Deep Learning (DL), techniques offer considerable promise for patient volume forecasting of hospital visits and in-hospital mortality. In this work, we present a systematic review of the use of ML to predict patient volume hospital attendance and in-hospital mortality with the use of environmental predictors. We focus on answering how have ML been applied and what are the major environmental predictors. Using the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA), 21 studies were retained from three databases PubMed, Embase, and IEEE Explore. The search included studies from 2012 to 2022. Data extraction and Risk of Bias assessment were done by using standardized tools Checklist for Critical Appraisal and Data Extraction for Systematic Reviews of Prediction Modeling Studies (CHARMS), and Prediction model Risk Of Bias ASsessment Tool (PROBAST). The study protocol for this review was registered on PROSPERO, assigned registration code CRD42023390400.