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Published in: BMC Psychiatry 1/2020

01-12-2020 | Suicide | Research article

Recognizing states of psychological vulnerability to suicidal behavior: a Bayesian network of artificial intelligence applied to a clinical sample

Authors: Jorge Barros, Susana Morales, Arnol García, Orietta Echávarri, Ronit Fischman, Marta Szmulewicz, Claudia Moya, Catalina Núñez, Alemka Tomicic

Published in: BMC Psychiatry | Issue 1/2020

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Abstract

Background

This study aimed to determine conditional dependence relationships of variables that contribute to psychological vulnerability associated with suicide risk. A Bayesian network (BN) was developed and applied to establish conditional dependence relationships among variables for each individual subject studied. These conditional dependencies represented the different states that patients could experience in relation to suicidal behavior (SB). The clinical sample included 650 mental health patients with mood and anxiety symptomatology.

Results

Mainly indicated that variables within the Bayesian network are part of each patient’s state of psychological vulnerability and have the potential to impact such states and that these variables coexist and are relatively stable over time. These results have enabled us to offer a tool to detect states of psychological vulnerability associated with suicide risk.

Conclusion

If we accept that suicidal behaviors (vulnerability, ideation, and suicidal attempts) exist in constant change and are unstable, we can investigate what individuals experience at specific moments to become better able to intervene in a timely manner to prevent such behaviors. Future testing of the tool developed in this study is needed, not only in specialized mental health environments but also in other environments with high rates of mental illness, such as primary healthcare facilities and educational institutions.
Footnotes
1
Conditional dependency relationships: measures of the probability of an event occurring given that another event has (by assumption, presumption, assertion or evidence) occurred [14].
 
2
Support vector machine models: Supervised learning models associated with learning algorithms that analyze data used for regression and classification analysis. Starting with a set of training examples, each marked as belonging to one or the other of two categories, an SVM training algorithm builds a model that assigns new examples to one category or the other, hence resolving a non-probabilistic binary linear classifier [6].
 
3
Decision tree technique: A model of computation in which an algorithm is considered to be a sequence of branching operations based on comparisons of some quantities, the comparisons being assigned the unit computational cost. The branching operations are called “queries or tests”. The algorithm may be considered a computation of a Boolean function where the input is a series of queries and the output is a final decision, in which every query is dependent on previous queries or tests [7].
 
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Metadata
Title
Recognizing states of psychological vulnerability to suicidal behavior: a Bayesian network of artificial intelligence applied to a clinical sample
Authors
Jorge Barros
Susana Morales
Arnol García
Orietta Echávarri
Ronit Fischman
Marta Szmulewicz
Claudia Moya
Catalina Núñez
Alemka Tomicic
Publication date
01-12-2020
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2020
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/s12888-020-02535-x

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