| Objective: The aim of the present case-control study was to investigate the related risk factors for adolescent attempted suicides.Methods: The case-control study and assessment scales were used.70 attempted suicide adolescents (age 11-18 years) and 70 healthy controls matched by age and sex attended this study. All of them completed the following questionnaires: general condition questionnaire (mental disorder history and family history included), SCL-90, HAMD, HAMA, IBS, EMBU, SSRS and ASLEC. T test, x2 test and Logistic stepwise regression analysis were used to analyze the collected data in SPSS 14.0.Results: (1) The clinical characteristics of suicide attempters were as follows: 62.9%were committed poison, 35.7% had told someone their suicidal idea, and 24.3% had formulated careful planning. (2) 32.8% suicide attempters had mental disorder history, significantly different from the controls (P<0.01). There were significant differences from somatization, constraint, anxiety, hostility, interpersonal relationship sensitiveness, depression, paranoia, phobophobia and psychotic factors between two groups (P<0.01). The total HAMD score (31.99±6.13) of suicide attempters was higher than the controls (2.60±0.86). Significant differences existed from HAMD factors between the two groups (P<0.01). The total HAMA score of suicide attempters (19.15±5.91) was higher than the controls (5.28±1.22). There were significant differences of two HAMA factors, psychic anxiety and somatic anxiety between the two groups (P<0.01). Comparison of impulsive behavior, the total IBS score of suicide attempters (100.48±6.45) was higher than the controls (72.04±3.90). Differences between two groups were found in planning, motive, cognition factors and total scores (P<0.01). (3) Family condition was significantly less stable in attempted suicide adolescents (P<0.05). 14.3% suicide attempters suffered from parents'divorce or separation while 4.29% controls lived under unstable family condition. Fathers of attempted suicide adolescents were more severe and paid too much interference, while mothers often overprotect their child. The score of feeling understand of the parents were obviously lower in suicide attempters (P<0.01). (4) 10% suicide attempters went through suicide behavior around, obviously more than the controls (1.43%). Comparison of life events, there were differences of interpersonal relationship, learning pressure, suffering punish, healthy accustomization factors and so on (P<0.01). Comparison of social support, the total SSRS score (28.50±1.27) of suicide attempters was lower than the controls (34.56±3.73). There were significant differences from subjective support score and objective support score (P<0.01). (5) The percentage of suicide and mental disorder family history among the suicide attempters were 14.3% and 10%, respectively. This was significantly different from the controls (1.43% and 0%), P<0.05.Conclusions: (1) Psychological factors, such as depression, anxiety, somatization, constraint, hostility, interpersonal relationship sensitiveness, paranoia, phobophobia and psychotic factors are associated with adolescent's suicide behavior. (2) Adolescent's suicide behavior is influenced by family condition. Unstable parents'marriage, fathers'interference and mothers'overprotection are all risk factors associated with adolescent suicide. (3) Poor relationship, high study pressure, low social support and suicide behaviors around are all related to adolescent suicide. (4) Suicide and mental disorder family history are risk factors related to adolescent suicide.
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