Classification tree analysis on epidemic factors and high-risk populations of attempted suicide

  Objective   To understand important factors and high-risk populations of attempted suicide, and to provide the scientific base for the intervention of suicidal behaviour.

  Methods   220 suicide attempters and paired controls were analyzed by CART analysis.

  Results   The important classification factors of attempted suicide were depression, affective conflicts having given spirit support to friends, ApoE-E2/3, low monthly income perperson, dissat isfaction with life now, cigarette smoking, introversion character.The high-risk populations of attempted suicide were populations with: (1)affective conflicts+depression; (2)affective conflicts+no depression+low monthly income perperson; (3)no affective conflicts+depression+without given spirit support to friends; (4)no affective conflicts+depression+having given spirit support to friends+ApoE-2/3;(5)affective conflicts+no depression+compar atively high monthly income perperson; (6)affective conflicts+no depression +comparatively high monthly income perperson+not introversion character+dissatisfaction with life now.Cases in those populations took up 90% of all cases.

  Conclusion   Those populations should be paid attention to by clinic doctors and community workers.