Bayesian Network vs. Cox’s Proportional Hazard Model of PAH Risk: A Comparison

Jidapa Kraisangka , Marek Drużdżel , Lisa C. Lohmueller , Manreet K. Kanwar , James F. Antaki , Raymond L. Benza


Pulmonary arterial hypertension (PAH) is a severe and often deadly disease, originating from an increase in pulmonary vascular resistance. The REVEAL risk score calculator [3] has been widely used and extensively validated by health-care professionals to predict PAH risks. The calculator is based on the Cox’s Proportional Hazard (CPH) model, a popular statistical technique used in risk estimation and survival analysis. In this study, we explore an alternative approach to the PAH patient risk assessment based on a Bayesian network (BN) model using the same variables and discretization cut points as the REVEAL risk score calculator. We applied a Tree Augmented Naïve Bayes algorithm for structure and parameter learning from a data set of 2,456 adult patients from the REVEAL registry. We compared our BN model against the original CPH-based calculator quantitatively and qualitatively. Our BN model relaxes some of the CPH model assumptions, which seems to lead to a higher accuracy (AUC = 0.77) than that of the original calculator (AUC = 0.71). We show that hazard ratios, expressing strength of influence in the CPH model, are static and insensitive to changes in context, which limits applicability of the CPH model to personalized medical care.
Author Jidapa Kraisangka
Jidapa Kraisangka,,
, Marek Drużdżel (FCS / SD)
Marek Drużdżel,,
- Software Department
, Lisa C. Lohmueller
Lisa C. Lohmueller,,
, Manreet K. Kanwar
Manreet K. Kanwar,,
, James F. Antaki
James F. Antaki,,
, Raymond L. Benza
Raymond L. Benza,,
Publication size in sheets0.5
Book Riaño David, Wilk Szymon, Teije Annette ten (eds.): Artificial Intelligence in Medicine : 17th Conference on Artificial Intelligence in Medicine, AIME 2019 : proceedings, Lecture Notes In Computer Science, no. 11526, 2019, Springer, ISBN 978-3-030-21641-2, 429 p., DOI:10.1007/978-3-030-21642-9
Keywords in EnglishBayesian networks, risk assessment, Cox’s proportional hazard model, hazard ratios, pulmonary arterial hypertension
Internal identifierROC 19-20
Languageen angielski
Score (nominal)140
Score sourceconferenceList
ScoreMinisterial score = 140.0, 28-02-2020, ChapterFromConference
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