RESUMO
Introduction: the Coronavirus Disease 2019 (COVID-19) is a viral disease which has been declared a pandemic by the WHO. Diagnostic tests are expensive and are not always available. Researches using machine learning (ML) approach for diagnosing SARS-CoV-2 infection have been proposed in the literature to reduce cost and allow better control of the pandemic. Objective: we aim to develop a machine learning model to predict if a patient has COVID-19 with epidemiological data and clinical features. Methods: we used six ML algorithms for COVID-19 screening through diagnostic prediction and did an interpretative analysis using SHAP models and feature importances. Results: our best model was XGBoost (XGB) which obtained an area under the ROC curve of 0.752, a sensitivity of 90%, a specificity of 40%, a positive predictive value (PPV) of 42.16%, and a negative predictive value (NPV) of 91.0%. The best predictors were fever, cough, history of international travel less than 14 days ago, male gender, and nasal congestion, respectively. Conclusion: we conclude that ML is an important tool for screening with high sensitivity, compared to rapid tests, and can be used to empower clinical precision in COVID-19, a disease in which symptoms are very unspecific.
Introdução: a Doença do Coronavírus 2019 (COVID-19) é uma doença viral que foi declarada uma pandemia pela OMS. Testes diagnósticos são caros e nem sempre estão disponíveis. Pesquisas utilizando a abordagem de aprendizado de máquina (ML) para o diagnóstico de infecção por SARS-CoV-2 têm sido propostas na literatura para reduzir custos e permitir melhor controle da pandemia.Objetivo: nosso objetivo é desenvolver um modelo de aprendizado de máquina para prever se um paciente tem COVID-19 com dados epidemiológicos e características clínicas.Método: usamos seis algoritmos de ML para triagem de COVID-19 por meio de predição diagnóstica e fizemos uma análise interpretativa usando modelos SHAP e importâncias de recursos.Resultados: nosso melhor modelo foi o XGBoost (XGB) que obteve área sob a curva ROC de 0,752, sensibilidade de 90%, especificidade de 40%, valor preditivo positivo (VPP) de 42,16% e valor preditivo negativo ( VPL) de 91,0%. Os melhores preditores foram febre, tosse, história de viagem internacional há menos de 14 dias, sexo masculino e congestão nasal, respectivamente.Conclusão: Concluímos que o ML é uma importante ferramenta de triagem com alta sensibilidade, em comparação aos testes rápidos, e pode ser usado para potencializar a precisão clínica na COVID-19, doença em que os sintomas são muito inespecíficos.
RESUMO
The COVID-19 pandemic has affected all aspects of society. Researchers worldwide have been working to provide new solutions to and better understanding of this coronavirus. In this research, our goal was to perform a Bibliometric Network Analysis (BNA) to investigate the strategic themes, thematic evolution structure and trends of coronavirus during the first eight months of COVID-19 in the Web of Science (WoS) database in 2020. To do this, 14,802 articles were analyzed, with the support of the SciMAT software. This analysis highlights 24 themes, of which 11 of the more important ones were discussed in-depth. The thematic evolution structure shows how the themes are evolving over time, and the most developed and future trends of coronavirus with focus on COVID-19 were visually depicted. The results of the strategic diagram highlight 'CHLOROQUINE', 'ANXIETY', 'PREGNANCY' and 'ACUTE-RESPIRATORY-SYNDROME', among others, as the clusters with the highest number of associated citations. The thematic evolution. structure presented two thematic areas: "Damage prevention and containment of COVID-19" and "Comorbidities and diseases caused by COVID-19", which provides new perspectives and futures trends of the field. These results will form the basis for future research and guide decision-making in coronavirus focused on COVID-19 research and treatments.
