Prevalence and correlates of suicidal ideation among Operation Enduring Freedom and Operation Iraqi Freedom veterans

Background: We sought to determine the prevalence and correlates of suicidal ideation (SI) among Operation Enduring Freedom and Operation Iraqi Freedom (OEF/OIF) veterans following the Department of Veterans Affairs' (VA) 2007 implementation of required brief SI assessments for veterans who screen positive for depression and post-traumatic stress disorder. Methods: We retrospectively identified OEF/OIF veterans screened for depression using the Patient Health Questionnaire (PHQ-2) between April 2008 and September 2009 at three geographically-distinct VA Medical Centers' primary care or mental health clinics. Veteran responses to a two-item risk assessment tool (VA Pocket Card) or PHQ-9 9th item, administered following a positive depression screen (PHQ-2 > 3), were determined using manual chart review. Generalized estimating equations were used to calculate adjusted odds ratios for demographic and clinical correlates of positive SI assessments. Results: Of 1340 OEF/OIF veterans with positive depression screens, 32.4% reported SI. In multivariate models, odds of SI were lower for non-Hispanic white veterans (AOR=0.68) and greater for those with PHQ-2 >= 5 (AOR=1.87), depression (AOR=1.45), bipolar disorder/schizophrenia (AOR=2.84), and 2 or >= 3 diagnoses (AORs=1.59 and 2.49, respectively). Limitations: Study findings may not be generalizable to non-veteran patient populations and the study does not address the reliability and validity of tools employed for brief suicidal ideation assessment. Conclusions: SI is common among OEF/OIF veterans who receive VA care, perhaps more so among non-white veterans. Targeting veterans with higher PHQ-2 scores for SI assessment should be considered to reduce patient and administrative burden. Published by Elsevier B.V.