A causal learning framework for the analysis and interpretation of COVID-19 clinical data

• URL: http://arxiv.org/abs/2105.06998v1
• Date: Fri, 14 May 2021 15:58:18 GMT
• Title: A causal learning framework for the analysis and interpretation of COVID-19 clinical data
• Authors: Elisa Ferrari, Luna Gargani, Greta Barbieri, Lorenzo Ghiadoni, Francesco Faita, Davide Bacciu
• Abstract summary: The workflow consists in a multi-step approach that goes from identifying the main causes of patient's outcome through BSL. We evaluate our approach on a feature-rich COVID-19 dataset, showing that the proposed framework provides a schematic overview of the multi-factorial processes that jointly contribute to the outcome. Our approach yields to a highly interpretable tool correctly predicting the outcome of 85% of subjects based exclusively on 3 features.
• Score: 7.256237785391623
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We present a workflow for clinical data analysis that relies on Bayesian Structure Learning (BSL), an unsupervised learning approach, robust to noise and biases, that allows to incorporate prior medical knowledge into the learning process and that provides explainable results in the form of a graph showing the causal connections among the analyzed features. The workflow consists in a multi-step approach that goes from identifying the main causes of patient's outcome through BSL, to the realization of a tool suitable for clinical practice, based on a Binary Decision Tree (BDT), to recognize patients at high-risk with information available already at hospital admission time. We evaluate our approach on a feature-rich COVID-19 dataset, showing that the proposed framework provides a schematic overview of the multi-factorial processes that jointly contribute to the outcome. We discuss how these computational findings are confirmed by current understanding of the COVID-19 pathogenesis. Further, our approach yields to a highly interpretable tool correctly predicting the outcome of 85% of subjects based exclusively on 3 features: age, a previous history of chronic obstructive pulmonary disease and the PaO2/FiO2 ratio at the time of arrival to the hospital. The inclusion of additional information from 4 routine blood tests (Creatinine, Glucose, pO2 and Sodium) increases predictive accuracy to 94.5%.

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