Suicide ideation of individuals in online social networks

Suicide explains the largest number of death tolls among Japanese adolescents in their twenties and thirties. Suicide is also a major cause of death for adolescents in many other countries. Although social isolation has been implicated to influence the tendency to suicidal behavior, the impact of so...

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Veröffentlicht in:PloS one 2013-04, Vol.8 (4), p.e62262-e62262
Hauptverfasser: Masuda, Naoki, Kurahashi, Issei, Onari, Hiroko
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Onari, Hiroko
description Suicide explains the largest number of death tolls among Japanese adolescents in their twenties and thirties. Suicide is also a major cause of death for adolescents in many other countries. Although social isolation has been implicated to influence the tendency to suicidal behavior, the impact of social isolation on suicide in the context of explicit social networks of individuals is scarcely explored. To address this question, we examined a large data set obtained from a social networking service dominant in Japan. The social network is composed of a set of friendship ties between pairs of users created by mutual endorsement. We carried out the logistic regression to identify users' characteristics, both related and unrelated to social networks, which contribute to suicide ideation. We defined suicide ideation of a user as the membership to at least one active user-defined community related to suicide. We found that the number of communities to which a user belongs to, the intransitivity (i.e., paucity of triangles including the user), and the fraction of suicidal neighbors in the social network, contributed the most to suicide ideation in this order. Other characteristics including the age and gender contributed little to suicide ideation. We also found qualitatively the same results for depressive symptoms.
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Suicide is also a major cause of death for adolescents in many other countries. Although social isolation has been implicated to influence the tendency to suicidal behavior, the impact of social isolation on suicide in the context of explicit social networks of individuals is scarcely explored. To address this question, we examined a large data set obtained from a social networking service dominant in Japan. The social network is composed of a set of friendship ties between pairs of users created by mutual endorsement. We carried out the logistic regression to identify users' characteristics, both related and unrelated to social networks, which contribute to suicide ideation. We defined suicide ideation of a user as the membership to at least one active user-defined community related to suicide. We found that the number of communities to which a user belongs to, the intransitivity (i.e., paucity of triangles including the user), and the fraction of suicidal neighbors in the social network, contributed the most to suicide ideation in this order. Other characteristics including the age and gender contributed little to suicide ideation. We also found qualitatively the same results for depressive symptoms.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23638019</pmid><doi>10.1371/journal.pone.0062262</doi><oa>free_for_read</oa></addata></record>
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subjects Adolescent
Adolescents
Case-Control Studies
Chi-square test
Data mining
Death & dying
Depression
Female
Humans
Internet
Logistic Models
Male
Medicine
Mental depression
Multivariate Analysis
Social and Behavioral Sciences
Social behavior
Social interactions
Social isolation
Social network analysis
Social Networking
Social networks
Social organization
Social research
Sociology
Studies
Suicidal Ideation
Suicide
Suicides & suicide attempts
Teenagers
Triangles
Variables
title Suicide ideation of individuals in online social networks
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