10 results on '"Tortù, Costanza"'
Search Results
2. Causal Effects with Hidden Treatment Diffusion on Observed or Partially Observed Networks
- Author
-
Tortú, Costanza, Crimaldi, Irene, Mealli, Fabrizia, and Forastiere, Laura
- Subjects
Statistics - Methodology - Abstract
In randomized experiments, interactions between units might generate a treatment diffusion process. This is common when the treatment of interest is an actual object or product that can be shared among peers (e.g., flyers, booklets, videos). For instance, if the intervention of interest is an information campaign realized through the distribution of a video to targeted individuals, some of these treated individuals might share the video they received with their friends. Such a phenomenon is usually unobserved, causing a misallocation of individuals in the two treatment arms: some of the initially untreated units might have actually received the treatment by diffusion. Treatment misclassification can, in turn, introduce a bias in the estimation of the causal effect. Inspired by a recent field experiment on the effect of different types of school incentives aimed at encouraging students to attend cultural events, we present a novel approach to deal with a hidden diffusion process on observed or partially observed networks.Specifically, we develop a simulation-based sensitivity analysis that assesses the robustness of the estimates against the possible presence of a treatment diffusion. We simulate several diffusion scenarios within a plausible range of sensitivity parameters and we compare the treatment effect which is estimated in each scenario with the one that is obtained while ignoring the diffusion process. Results suggest that even a treatment diffusion parameter of small size may lead to a significant bias in the estimation of the treatment effect.
- Published
- 2021
3. Heterogeneous Treatment and Spillover Effects under Clustered Network Interference
- Author
-
Bargagli-Stoffi, Falco J., Tortù, Costanza, and Forastiere, Laura
- Subjects
Statistics - Methodology - Abstract
The bulk of causal inference studies rule out the presence of interference between units. However, in many real-world scenarios, units are interconnected by social, physical, or virtual ties, and the effect of the treatment can spill from one unit to other connected individuals in the network. In this paper, we develop a machine learning method that uses tree-based algorithms and a Horvitz-Thompson estimator to assess the heterogeneity of treatment and spillover effects with respect to individual, neighborhood, and network characteristics in the context of clustered networks and neighborhood interference within clusters. The proposed Network Causal Tree (NCT) algorithm has several advantages. First, it allows the investigation of the treatment effect heterogeneity, avoiding potential bias due to the presence of interference. Second, understanding the heterogeneity of both treatment and spillover effects can guide policy-makers in scaling up interventions, designing targeting strategies, and increasing cost-effectiveness. We investigate the performance of our NCT method using a Monte Carlo simulation study, and we illustrate its application to assess the heterogeneous effects of information sessions on the uptake of a new weather insurance policy in rural China.
- Published
- 2020
4. Physical and stressful psychological impacts of prolonged personal protective equipment use during the COVID-19 pandemic: A cross-sectional survey study
- Author
-
Candido, Giuseppe, Tortù, Costanza, Seghieri, Chiara, Tartaglia, Riccardo, Baglioni, Chiara, Citti, Paolo, Raciti, Ida Marina, La Regina, Micaela, Simonini, Silvia, Urbani, Moira, Parretti, Chiara, and Barach, Paul
- Published
- 2023
- Full Text
- View/download PDF
5. Addressing chronic diseases: a comparative study of policies towards type-2 diabetes and hypertension in selected European countries.
- Author
-
Seghieri, Chiara, Ferré, Francesca, Tortù, Costanza, Bertarelli, Gaia, Mavrogianni, Christina, Usheva, Natalya, Toti, Florian, Moreno, Luis, Agapidaki, Eirini, and Manios, Yannis
- Subjects
HYPERTENSION epidemiology ,PATIENT education ,RISK assessment ,GOVERNMENT policy ,COMPUTER software ,EDUCATION ,HUMAN services programs ,RESEARCH funding ,HYPERTENSION ,DISEASE management ,INFORMATION resources ,REPORTING of diseases ,NON-communicable diseases ,TYPE 2 diabetes ,CHILD development ,COMPARATIVE studies - Abstract
Background Type-2 diabetes (T2D) and hypertension (HTN) are two of the most prevalent non-communicable diseases (NCDs): they both cause a relevant number of premature deaths worldwide and heavily impact the national health systems. This study illustrates the impact of HTN and T2D in four European countries (Albania, Bulgaria, Greece and Spain) and compares their policies towards the monitoring and management of HTN and T2D and the prevention of NCDs as a whole. This analysis is conducted throughout the DigiCare4You Project (H2020)—which implements an innovative solution involving digital tools for the prevention and management of T2D and HTN. Methods The analysis is implemented through desk research, and it is enriched with additional information directly provided by the local coordinators in the four countries, by filling specific semi-structured forms. Results The countries exhibit significant differences in the prevalence of HTN and T2D and available policies and programs targeted to these two chronic conditions. Each country has implemented strategies for HTN and T2D, including prevention initiatives, therapeutic guidelines, educational programs and children's growth monitoring programs. However, patient education on proper disease management needs improvement in all countries, registries about patients affected by HTN and T2D are not always available, and not all countries promoted acts to contain the increasing rates of risk factors related to NCDs. Conclusions While political awareness of the risks associated with HTN, T2D and NCDs in general is growing, there is a collective need for countries to strengthen their policies for preventing and managing these chronic diseases. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
6. Physical and Stressful Psychological Impacts of COVID-19 on Healthcare Workers Due to Prolonged Personal Protective Equipment Use: A Cross-Sectional Survey Study
- Author
-
Candido, Giuseppe, primary, Tortù, Costanza, additional, Seghieri, Chiara, additional, Tartaglia, Riccardo, additional, Baglioni, Chiara, additional, Citti, Paolo, additional, Raciti, Ida, additional, La Regina, Micaela, additional, Simonini, Silvia, additional, Urbani, Moira, additional, Parretti, Chiara, additional, and Barach, Paul, additional
- Published
- 2023
- Full Text
- View/download PDF
7. Association of Early Norepinephrine Administration With 24-Hour Mortality Among Patients With Blunt Trauma and Hemorrhagic Shock
- Author
-
Gauss, Tobias, Richards, Justin, Tortù, Costanza, Ageron, François-Xavier, Hamada, Sophie, Josse, Julie, Husson, François, Harrois, Anatole, Scalea, Thomas, Vivant, Valentin, Meaudre, Eric, Morrison, Jonathan, Galvagno, Samue, Bouzat, Pierre, Albasini, François, Briot, Olivier, Chaboud, Laurent, Chateigner Coelsch, Sophie, Chaumat, Alexandre, Comlar, Thomas, Debas, Olivier, Debaty, Guillaume, Dupré-Nalet, Emmanuelle, Gay, Samuel, Ginestie, Edouard, Girard, Edouard, Grèze, Jules, Haesevoets, Marc, Hallain, Marie, Haller, Etienne, Hoareau, Christophe, Lanaspre, Bernard, Lespinasse, Safia, Levrat, Albrice, Mermillod-Blondin, Romain, Nicoud, Philippe, Rancurel, Elisabeth, Thouret, Jean-Marc, Vallenet, Claire, Vallot, Cécile, Zerr, Bénédicte, Abback, Paér-Sélim, Audibert, Gérard, Boutonnet, Mathieu, Clavier, Thomas, Cook, Fabrice, Eljamri, Mohamed, Floch, Thierry, Gaertner, Elisabeth, Garrigue, Delphine, Geeraerts, Thomas, Gette, Sebastien, Godier, Anne, Gosset, Pierre, Hanouz, Jean-Luc, Moyer, Jean-Denis, Langeron, Olivier, Leone, Marc, Pottecher, Julien, Portaz, Jonathan, Raux, Mathieu, Scotto, Marion, Willig, Mathieu, Hardy, Alexia, French Trauma Research Initiative, Albasini, F., Briot, O., Chaboud, L., Chateigner Coelsch, S., Chaumat, A., Comlar, T., Debas, O., Debaty, G., Dupré-Nalet, E., Gay, S., Ginestie, E., Girard, E., Grèze, J., Haesevoets, M., Hallain, M., Haller, E., Hoareau, C., Lanaspre, B., Lespinasse, S., Levrat, A., Mermillod-Blondin, R., Nicoud, P., Rancurel, E., Thouret, J.M., Vallenet, C., Vallot, C., Zerr, B., Abback, P.S., Audibert, G., Boutonnet, M., Clavier, T., Cook, F., Eljamri, M., Floch, T., Gaertner, E., Garrigue, D., Geeraerts, T., Gette, S., Godier, A., Gosset, P., Hanouz, J.L., Moyer, J.D., Langeron, O., Leone, M., Pottecher, J., Portaz, J., Raux, M., Scotto, M., Willig, M., Hardy, A., Hôpital Beaujon [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hôpital d'Annecy, Centre de recherche en épidémiologie et santé des populations (CESP), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, Inria-SIC [Sophia Antipolis], Inria Sophia Antipolis - Méditerranée (CRISAM), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Institut Desbrest de santé publique (IDESP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Médecine de précision par intégration de données et inférence causale (PREMEDICAL), Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut Desbrest de santé publique (IDESP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM), Institut de Recherche Mathématique de Rennes (IRMAR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École normale supérieure - Rennes (ENS Rennes)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut Agro Rennes Angers, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Hôpital Bicêtre, Université Paris-Saclay, Hôpital d'Instruction des Armées Sainte Anne, Service de Santé des Armées, École du Val de Grâce (EVDG), CHU Grenoble, [GIN] Grenoble Institut des Neurosciences (GIN), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Grenoble Alpes (UGA), Hopital Saint-Jean-de-Maurienne, Laboratoire Charles Coulomb (L2C), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), and ANR-11-LABX-0020,LEBESGUE,Centre de Mathématiques Henri Lebesgue : fondements, interactions, applications et Formation(2011)
- Subjects
Male ,Norepinephrine ,[MATH.MATH-ST]Mathematics [math]/Statistics [math.ST] ,Humans ,Hemorrhage ,General Medicine ,Middle Aged ,Shock, Hemorrhagic ,Wounds, Nonpenetrating ,Hemorrhage/drug therapy ,Norepinephrine/therapeutic use ,Retrospective Studies ,Shock, Hemorrhagic/drug therapy ,Wounds, Nonpenetrating/complications ,Wounds, Nonpenetrating/drug therapy - Abstract
ImportanceHemorrhagic shock is a common cause of preventable death after injury. Vasopressor administration for patients with blunt trauma and hemorrhagic shock is often discouraged.ObjectiveTo evaluate the association of early norepinephrine administration with 24-hour mortality among patients with blunt trauma and hemorrhagic shock.Design, Setting, and ParticipantsThis retrospective, multicenter, observational cohort study used data from 3 registries in the US and France on all consecutive patients with blunt trauma from January 1, 2013, to December 31, 2018. Patients were alive on admission with hemorrhagic shock, defined by prehospital or admission systolic blood pressure less than 100 mm Hg and evidence of hemorrhage (ie, prehospital or resuscitation room transfusion of packed red blood cells, receipt of emergency treatment for hemorrhage control, transfusion of >10 units of packed red blood cells in the first 24 hours, or death from hemorrhage). Blunt trauma was defined as any exposure to nonpenetrating kinetic energy, collision, or deceleration. Statistical analysis was performed from January 15, 2021, to February 22, 2022.ExposureContinuous administration of norepinephrine in the prehospital environment or resuscitation room prior to hemorrhage control, according to European guidelines.Main Outcomes and MeasuresThe primary outcome was 24-hour mortality, and the secondary outcome was in-hospital mortality. The average treatment effect (ATE) of early norepinephrine administration on 24-hour mortality was estimated according to the Rubin causal model. Inverse propensity score weighting and the doubly robust approach with 5 distinct analytical strategies were used to determine the ATE.ResultsA total of 52 568 patients were screened for inclusion, and 2164 patients (1508 men [70%]; mean [SD] age, 46 [19] years; median Injury Severity Score, 29 [IQR, 17-36]) presented with acute hemorrhage and were included. A total of 1497 patients (69.1%) required emergency hemorrhage control, 128 (5.9%) received a prehospital transfusion of packed red blood cells, and 543 (25.0%) received a massive transfusion. Norepinephrine was administered to 1498 patients (69.2%). The 24-hour mortality rate was 17.8% (385 of 2164), and the in-hospital mortality rate was 35.6% (770 of 2164). None of the 5 analytical strategies suggested any statistically significant association between norepinephrine administration and 24-hour mortality, with ATEs ranging from –4.6 (95% CI, –11.9 to 2.7) to 2.1 (95% CI, –2.1 to 6.3), or between norepinephrine administration and in-hospital mortality, with ATEs ranging from –1.3 (95% CI, –9.5 to 6.9) to 5.3 (95% CI, –2.1 to 12.8).Conclusions and RelevanceThe findings of this study suggest that early norepinephrine infusion was not associated with 24-hour or in-hospital mortality among patients with blunt trauma and hemorrhagic shock. Randomized clinical trials that study the effect of early norepinephrine administration among patients with trauma and hypotension are warranted to further assess whether norepinephrine is safe for patients with hemorrhagic shock.
- Published
- 2022
8. Reduced Abortion Rates and Improved Provision of Counseling and Contraception Services: Analysis of a Regional Campaign for Young Women in Italy
- Author
-
Ferrari, Amerigo, primary, Bonciani, Manila, additional, Corazza, Ilaria, additional, Tortù, Costanza, additional, Simoncini, Tommaso, additional, and Vainieri, Milena, additional
- Published
- 2022
- Full Text
- View/download PDF
9. Essays on causal inference and complex networks
- Author
-
Tortù, Costanza
- Abstract
This dissertation is a collection of articles that develop statistical methods for performing causal inference on network data. In bridging these two themes, causal inference and complex networks, the thesis develops four complementary methodological contributions in two main settings that often arise in network data: (i) both the treatment and the outcome are measured at the individual level but the treatment spills over through the network connections; (ii) both the treatment and outcomes are measured at dyadic level. In the first setting, it elaborates innovative techniques for assessing the direct and spillover effects of an intervention in a population of connected units, where the potential outcome of an agent is affected by the treatment status of other interfering agents. In particular, the articles featured in the dissertation expand the existing literature by developing methods that are useful for (i) estimating the effect of an observational multi-valued intervention in a sample of units connected through a weighted network; (ii) detecting and estimating heterogeneous treatment and spillover effects in presence of units who belong to exogenous clusters, and whose interactions are described by cluster-specific networks; (iii) accounting for hidden treatment diffusion processes in a partially unobserved network. In the second setting, the dissertation employs the potential outcomes framework to analyze causal relationships in network formation processes. Specifically, it develops an estimator for the causal effect that the existence of links in a “treatment network” has on the formation of links on an “outcome network,” with both networks being directed.
- Published
- 2020
- Full Text
- View/download PDF
10. Association of Early Norepinephrine Administration With 24-Hour Mortality Among Patients With Blunt Trauma and Hemorrhagic Shock.
- Author
-
Gauss T, Richards JE, Tortù C, Ageron FX, Hamada S, Josse J, Husson F, Harrois A, Scalea TM, Vivant V, Meaudre E, Morrison JJ, Galvagno S, and Bouzat P
- Subjects
- Hemorrhage drug therapy, Humans, Male, Middle Aged, Norepinephrine therapeutic use, Retrospective Studies, Shock, Hemorrhagic drug therapy, Wounds, Nonpenetrating complications, Wounds, Nonpenetrating drug therapy
- Abstract
Importance: Hemorrhagic shock is a common cause of preventable death after injury. Vasopressor administration for patients with blunt trauma and hemorrhagic shock is often discouraged., Objective: To evaluate the association of early norepinephrine administration with 24-hour mortality among patients with blunt trauma and hemorrhagic shock., Design, Setting, and Participants: This retrospective, multicenter, observational cohort study used data from 3 registries in the US and France on all consecutive patients with blunt trauma from January 1, 2013, to December 31, 2018. Patients were alive on admission with hemorrhagic shock, defined by prehospital or admission systolic blood pressure less than 100 mm Hg and evidence of hemorrhage (ie, prehospital or resuscitation room transfusion of packed red blood cells, receipt of emergency treatment for hemorrhage control, transfusion of >10 units of packed red blood cells in the first 24 hours, or death from hemorrhage). Blunt trauma was defined as any exposure to nonpenetrating kinetic energy, collision, or deceleration. Statistical analysis was performed from January 15, 2021, to February 22, 2022., Exposure: Continuous administration of norepinephrine in the prehospital environment or resuscitation room prior to hemorrhage control, according to European guidelines., Main Outcomes and Measures: The primary outcome was 24-hour mortality, and the secondary outcome was in-hospital mortality. The average treatment effect (ATE) of early norepinephrine administration on 24-hour mortality was estimated according to the Rubin causal model. Inverse propensity score weighting and the doubly robust approach with 5 distinct analytical strategies were used to determine the ATE., Results: A total of 52 568 patients were screened for inclusion, and 2164 patients (1508 men [70%]; mean [SD] age, 46 [19] years; median Injury Severity Score, 29 [IQR, 17-36]) presented with acute hemorrhage and were included. A total of 1497 patients (69.1%) required emergency hemorrhage control, 128 (5.9%) received a prehospital transfusion of packed red blood cells, and 543 (25.0%) received a massive transfusion. Norepinephrine was administered to 1498 patients (69.2%). The 24-hour mortality rate was 17.8% (385 of 2164), and the in-hospital mortality rate was 35.6% (770 of 2164). None of the 5 analytical strategies suggested any statistically significant association between norepinephrine administration and 24-hour mortality, with ATEs ranging from -4.6 (95% CI, -11.9 to 2.7) to 2.1 (95% CI, -2.1 to 6.3), or between norepinephrine administration and in-hospital mortality, with ATEs ranging from -1.3 (95% CI, -9.5 to 6.9) to 5.3 (95% CI, -2.1 to 12.8)., Conclusions and Relevance: The findings of this study suggest that early norepinephrine infusion was not associated with 24-hour or in-hospital mortality among patients with blunt trauma and hemorrhagic shock. Randomized clinical trials that study the effect of early norepinephrine administration among patients with trauma and hypotension are warranted to further assess whether norepinephrine is safe for patients with hemorrhagic shock.
- Published
- 2022
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.