IMPORTANCEThe Veterans Health Administration (VHA) implemented a national clinical program using a suicide risk prediction algorithm, Recovery Engagement and Coordination for Health-Veterans Enhanced Treatment (REACH VET), in which clinicians facilitate care enhancements for individuals identified in local top 0.1% suicide risk tiers. Evaluation studies are needed. OBJECTIVE To determine associations with treatment engagement, health care utilization, suicide attempts, safety plan documentation, and 6-month mortality. DESIGN, SETTING, AND PARTICIPANTS This cohort study used triple differences analyses comparing 6-month changes in outcomes after vs before program entry for individuals entering the REACH VET program (March 2017-December 2018) vs a similarly identified top 0.1% suicide risk tier cohort from prior to program initiation (March 2014-December 2015), adjusting for trends across subthreshold cohorts. Subcohort analyses (including individuals from March 2017-June 2018) evaluated difference-in-differences for cause-specific mortality using death certificate data. The subthreshold cohorts included individuals in the top 0.3% to 0.1% suicide risk tier, below the threshold for REACH VET eligibility, from the concurrent REACH VET period and from the pre-REACH VET period. Data were analyzed from December 2019 through September 2021. EXPOSURES REACH VET-designated clinicians treatment reevaluation and outreach for care enhancements, including safety planning, increased monitoring, and interventions to enhance coping. MAIN OUTCOMES AND MEASURES Process outcomes included VHA scheduled, completed, and missed appointments; mental health visits; and safety plan documentation and documentation within 6 months for individuals without plans within the prior 2 years. Clinical outcomes included mental health admissions, emergency department visits, nonfatal suicide attempts, and all-cause, suicide, and nonsuicide external-cause mortality. RESULTS A total of 173 313 individuals (mean [SD] age, 51.0 [14.7] years; 161 264 [93.1%] men and 12 049 [7.0%] women) were included in analyses, including 40 816 individuals eligible for REACH VET care and 36 604 individuals from the pre-REACH VET period in the top 0.1% of suicide risk.

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Background Cancer diagnoses are associated with an increased risk for suicide. The aim of this study was to evaluate this association among Veterans receiving Veterans Health Administration (VHA) care, a population that has an especially high suicide risk. Methods Among 4,926,373 Veterans with VHA use in 2011 and in 2012 or 2013, and without VHA cancer diagnoses in 2011, we assessed suicide risk following incident cancer diagnoses. Risk time was from initial VHA use in 2012–2013 to 12/31/2018 or death, whichever came first. Cox proportional hazards regression models evaluated associations between new cancer diagnoses and suicide risk, adjusting for age, sex, VHA regional network, and mental health comorbidities. Suicide rates were calculated among Veterans with new cancer diagnoses through 84 months following diagnosis. Results A new cancer diagnosis corresponded to a 47% higher suicide risk (Adjusted Hazard Ratio [aHR] = 1.47, 95% CI: 1.33–1.63). The cancer subtype associated with the highest suicide risk was esophageal cancer (aHR = 6.01, 95% CI: 3.73–9.68), and other significant subtypes included head and neck (aHR = 3.55, 95% CI: 2.74–4.62) and lung cancer (aHR = 2.35, 95% CI: 1.85–3.00). Cancer stages 3 (aHR = 2.36, 95% CI: 1.80–3.11) and 4 (aHR = 3.53, 95% CI: 2.81–4.43) at diagnosis were positively associated with suicide risk. Suicide rates were highest within 3 months following diagnosis and remained elevated in the 3–6‐ and 6–12‐month periods following diagnosis. Conclusion Among Veteran VHA users, suicide risk was elevated following new cancer diagnoses. Risk was particularly high in the first 3 months. Additional screening and suicide prevention efforts may be warranted for VHA Veterans newly diagnosed with cancer.

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12130 Background: Patients diagnosed with cancer are at an increased risk of adverse mental health outcomes including suicidal behavior. Suicide rates among Veterans are 50 percent greater than for non-Veteran US adults. To inform Veterans Affairs (VA) suicide prevention initiatives, it is important to understand associations between cancer and suicide risk among Veterans receiving VA healthcare from the Veterans Health Administration (VHA). Study aims were to assess associations between new cancer diagnoses and suicide among Veterans in VHA care to identify high risk diagnostic subgroups and risk-periods. Methods: We used a cohort study design, identifying 4,926,373 Veterans with VHA use in 2011 and either 2012 or 2013 and without a VHA cancer diagnosis in 2011. Incident cancer diagnoses, assessed between first VHA use in 2012-2013 and 12/31/2018, were characterized by subtype and stage using the VHA Oncology Raw Data. Data from the VA/Department of Defense Mortality Data Repository identified date and cause of death. Cox proportional hazards regression, accounting for time-varying cancer diagnosis, was used to evaluate associations between a new cancer diagnosis and suicide risk. An initial model adjusted for VHA regional network and patient age and sex. Cancer subtypes with significant associations with suicide were further assessed using a model that also adjusted for suicide attempts and mental health, tobacco use disorder, and other substance use disorder diagnoses in the prior year. Crude suicide rates following a new cancer diagnoses were calculated among Veterans with new diagnoses, 2012-2018 (N = 240,410). Rates were assessed up to 84 months following diagnosis. Results: On average, Veteran VHA users were followed for 6.0 years after their first VHA use in 2012-2013 and for 2.7 years following a new cancer diagnosis. Receipt of a new cancer diagnosis corresponded to a 43% (Adjusted Hazard Ratio [AHR] = 1.43, 95% CI: 1.29, 1.58) higher suicide risk, adjusting for covariates. The cancer subtype associated with the highest suicide risk was esophageal cancer (AHR = 5.93, 95% CI: 4.05, 10.51) and other significant subtypes included head and neck (AHR = 3.44, 95% CI: 2.65, 4.46) and lung cancer (AHR = 2.28, 95% CI: 1.79, 2.90). Cancer stages 3 (AHR = 2.29, 95% CI: 1.75, 3.01) and 4 (AHR = 3.45, 95% CI: 2.75, 4.34) at diagnosis were also positively associated with suicide risk. Suicide rates were highest in the first three months following a diagnosis (Rate = 128.3 per 100,000 person-years, 95% CI: 100.4, 161.6) and remained elevated through the first 12 months. Conclusions: Among Veteran VHA users, suicide risk was elevated following a new cancer diagnosis and was especially high in the initial 3 months. Additional screening and suicide prevention efforts may be warranted for VHA Veterans newly diagnosed with cancer, particularly among those diagnosed with esophageal, head and neck, or lung cancer or at stages 3 or 4.