Background Suicide risk assessment is a challenging problem. However, the current scale only measures the risk factors, while the protective factors are ignored.
Objective To translate the Multidimensional Suicide Inventory-28 (MSI-28) and evaluate its reliability and validity in Chinese naval personnel.
Methods Totally 1710 navy soldiers and officers participated in the test. Self-rating Idea of Suicide Scale (SIOSS) and Depression Anxiety Stress Scale-21 (DASS-21) were selected to evaluate concurrent validity.
Results Confirmatory factor analysis showed that the four-factor model of MSI-28 fitted well (λ2/df=4.98, RMSEA=0.05, NFI=0.95, GFI=0.93, CFI=0.96), and the internal consistency reliability of the scale was excellent (Cronbach’s α=0.86-0.93). The detection rate of suicidal ideation was higher among those officers and soldiers, who had no brothers or sisters, poor relationship with their parents, symptoms of severe oral ulcer and gastrointestinal tract, higher education level, and good family financial condition. Among the officers and soldiers with suicidal ideation, the difference in correlation between suicidal ideation and family connection was still statistically significant after controlling negative emotion (r=-0.23, P=0.036).
Conclusion MSI-28 has good construct validity, internal consistency reliability, and concurrent validity. Its results of protection factor dimension can provide additional evaluation information, which can be used as an effective supplement for suicide risk screening of naval officers and soldiers.
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