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Correlates of suicide among veterans treated in primary care: case-control study of a nationally representative sample.

Dobscha SK, Denneson LM, Kovas AE, Teo A, Forsberg CW, Kaplan MS, Bossarte R, McFarland BH. Correlates of suicide among veterans treated in primary care: case-control study of a nationally representative sample. Journal of general internal medicine. 2014 Dec 1; 29 Suppl 4:853-60.

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BACKGROUND: Veterans receiving Veterans Affairs (VA) healthcare have increased suicide risk compared to the general population. Many patients see primary care clinicians prior to suicide. Yet little is known about the correlates of suicide among patients who receive primary care treatment prior to death. OBJECTIVE: Our aim was to describe characteristics of veterans who received VA primary care in the 6 months prior to suicide; and to compare these to characteristics of control patients who also received VA primary care. DESIGN: This was a retrospective case-control study. SUBJECTS: The investigators partnered with VA operations leaders to obtain death certificate data from 11 states for veterans who died by suicide in 2009. Cases were matched 1:2 to controls based on age, sex, and clinician. MAIN MEASURES: Demographic, diagnosis, and utilization data were obtained from VA's Corporate Data Warehouse. Additional clinical and psychosocial context data were collected using manual medical record review. Multivariate conditional logistic regression was used to examine associations between potential predictor variables and suicide. KEY RESULTS: Two hundred and sixty-nine veteran cases were matched to 538 controls. Average subject age was 63 years; 97 % were male. Rates of mental health conditions, functional decline, sleep disturbance, suicidal ideation, and psychosocial stressors were all significantly greater in cases compared to controls. In the final model describing men in the sample, non-white race (OR? = 0.51; 95 % CI? = 0.27-0.98) and VA service-connected disability (OR? = 0.54; 95 % CI? = 0.36-0.80) were associated with decreased odds of suicide, while anxiety disorder (OR? = 3.52; 95 % CI? = 1.79-6.92), functional decline (OR? = 2.52; 95 % CI? = 1.55-4.10), depression (OR? = 1.82; 95 % CI? = 1.07-3.10), and endorsement of suicidal ideation (OR? = 2.27; 95 % CI? = 1.07-4.83) were associated with greater odds of suicide. CONCLUSIONS: Assessment for anxiety disorders and functional decline in addition to suicidal ideation and depression may be especially important for determining suicide risk in this population. Continued development of interventions that support identifying and addressing these conditions in primary care is indicated.

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