Suicide Ideation of Individuals in Online Social Networks

Naoki Masuda*, Issei Kurahashi, Hiroko Onari

*この研究の対応する著者

研究成果: Article査読

34 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号e62262
ジャーナルPloS one
8
4
DOI
出版ステータスPublished - 2013 4月 26
外部発表はい

ASJC Scopus subject areas

  • 一般

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