8 research outputs found
Are Textual Recommendations Enough? Guiding Physicians Toward the Design of Machine Learning Pipelines Through a Visual Platform
The prevalence of artificial intelligence (AI) in our daily lives is often
exaggerated by the media, leading to a positive public perception while overlooking
potential problems. In the field of medicine, it is crucial to educate future healthcare
professionals on the advantages and disadvantages of AI and to emphasize
the importance of creating fair, ethical, and reproducible models. The KoopaML
platform was developed to provide an educational and user-friendly interface for
inexperienced users to create AI pipelines. This study analyzes the quantitative
and interaction data gathered from a usability test involving physicians from the
University Hospital of Salamanca, with the aim of identifying new interaction
paradigms to improve the platformâs usability. The results shown that the platform
is difficult to learn for inexperienced users due to its contents related to AI.
Following these results, a set of improvements are proposed for the next version
of KoopaML, focusing on reducing the interactions needed to create the pipelines
Flexible Heuristics for Supporting Recommendations Within an AI Platform Aimed at Non-expert Users
The use of Machine Learning (ML) to resolve complex tasks has
become popular in several contexts. While these approaches are very effective
and have many related benefits, they are still very tricky for the general audience.
In this sense, expert knowledge is crucial to apply ML algorithms properly
and to avoid potential issues. However, in some situations, it is not possible to
rely on experts to guide the development of ML pipelines. To tackle this issue,
we present an approach to provide customized heuristics and recommendations
through a graphical platform to build ML pipelines, namely KoopaML, focused
on the medical domain.With this approach, we aim not only at providing an easy
way to apply ML for non-expert users, but also at providing a learning experience
for them to understand how these methods work
Testing and Improvements of KoopaML: A Platform to Ease the Development of Machine Learning Pipelines in the Medical Domain
Impact of the presence of heart disease, cardiovascular medications and cardiac events on outcome in COVID-19
Background: Cardiovascular risk factors and usage of cardiovascular medication are prevalent among coronavirus disease 2019 (COVID-19) patients. Little is known about the cardiovascular implications of COVID-19. The goal herein, was to evaluate the prognostic impact of having heart disease (HD) and taking cardiovascular medications in a population diagnosed of COVID-19 who required hospitalization. Also, we studied the development of cardiovascular events during hospitalization.
Methods: Consecutive patients with definitive diagnosis of COVID-19 made by a positive real time- -polymerase chain reaction of nasopharyngeal swabs who were admitted to the hospital from March 15 to April 14 were included in a retrospective registry. The association of HD with mortality and with mortality or respiratory failure were the primary and secondary objectives, respectively.
Results: A total of 859 patients were included in the present analysis. Cardiovascular risk factors were related to death, particularly diabetes mellitus (hazard ratio in the multivariate analysis: 1.810 [1.159â â2.827], p = 0.009). A total of 113 (13.1%) patients had HD. The presence of HD identified a group of patients with higher mortality (35.4% vs. 18.2%, p < 0.001) but HD was not independently related to prognosis; reninâangiotensinâaldosterone system inhibitors, calcium channel blockers, diuretics and beta-blockers did not worsen prognosis. Statins were independently associated with decreased mortality (0.551 [0.329â0.921], p = 0.023). Cardiovascular events during hospitalization identified a group of patients with poor outcome (mortality 31.8% vs. 19.3% without cardiovascular events, p = 0.007).
Conclusions: The presence of HD is related to higher mortality. Cardiovascular medications taken before admission are not harmful, statins being protective. The development of cardiovascular events during the course of the disease is related to poor outcome
Association between myocardial injury and prognosis of COVID-19 hospitalized patients, with or without heart disease. CARDIOVID registry
AsociaciĂłn entre el daño miocĂĄrdico y el pronĂłstico de pacientes hospitalizados por COVID-19, con y sin cardiopatĂa. Registro CARDIOVID
Predictive Power for Thrombus Detection after Atrial Appendage Closure: Machine Learning vs. Classical Methods
Device-related thrombus (DRT) after left atrial appendage (LAA) closure is infrequent but correlates with an increased risk of thromboembolism. Therefore, the search for DRT predictors is a topic of interest. In the literature, multivariable methods have been used achieving non-consistent results, and to the best of our knowledge, machine learning techniques have not been used yet for thrombus detection after LAA occlusion. Our aim is to compare both methodologies with respect to predictive power and the search for predictors of DRT. To this end, a multicenter study including 1150 patients who underwent LAA closure was analyzed. Two lines of experiments were performed: with and without resampling. Multivariate and machine learning methodologies were applied to both lines. Predictive power and the extracted predictors for all experiments were gathered. ROC curves of 0.5446 and 0.7974 were obtained for multivariate analysis and machine learning without resampling, respectively. However, the resampling experiment showed no significant difference between them (0.52 vs. 0.53 ROC AUC). A difference between the predictors selected was observed, with the multivariable methodology being more stable. These results question the validity of predictors reported in previous studies and demonstrate their disparity. Furthermore, none of the techniques analyzed is superior to the other for these data