title: Comprehensible Predictive Modeling Using Regularized Logistic Regression and Comorbidity Based Features.
abstract: Different studies have demonstrated the importance of comorbidities to better understand the origin and evolution of medical complications. This study focuses on improvement of the predictive model interpretability based on simple logical features representing comorbidities. We use group lasso based feature interaction discovery followed by a post-processing step, where simple logic terms are added. In the final step, we reduce the feature set by applying lasso logistic regression to obtain a compact set of non-zero coefficients that represent a more comprehensible predictive model. The effectiveness of the proposed approach was demonstrated on a pediatric hospital discharge dataset that was used to build a readmission risk estimation model. The evaluation of the proposed method demonstrates a reduction of the initial set of features in a regression model by 72%, with a slight improvement in the Area Under the ROC Curve metric from 0.763 (95% CI: 0.755-0.771) to 0.769 (95% CI: 0.761-0.777). Additionally, our results show improvement in comprehensibility of the final predictive model using simple comorbidity based terms for logistic regression.
authors.affiliation: Faculty of Health Sciences, University of Maribor, Maribor, Slovenia.|Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia.
authors.forename: Gregor
authors.initials: G
authors.lastname: Stiglic
authors.affiliation: Faculty of Health Sciences, University of Maribor, Maribor, Slovenia.
authors.forename: Petra
authors.initials: P
authors.lastname: Povalej Brzan
authors.affiliation: Faculty of Health Sciences, University of Maribor, Maribor, Slovenia.
authors.forename: Nino
authors.initials: N
authors.lastname: Fijacko
authors.affiliation: Department of Computer Science and Engineering, University of Connecticut, Storrs, Connecticut, United States of America.
authors.forename: Fei
authors.initials: F
authors.lastname: Wang
authors.affiliation: Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia.
authors.forename: Boris
authors.initials: B
authors.lastname: Delibasic
authors.affiliation: Department of Business Informatics, University of Applied Sciences Western Switzerland, Carouge, Switzerland.|Computer Science Department, University of Geneva, Geneva, Switzerland.
authors.forename: Alexandros
authors.initials: A
authors.lastname: Kalousis
authors.affiliation: Center for Data Analytics and Biomedical Informatics, Temple University, Philadelphia, Pennsylvania, United States of America.
authors.forename: Zoran
authors.initials: Z
authors.lastname: Obradovic
mesh_terms: D015897:Comorbidity; D008962:Models, Theoretical