Article2013

ANXIETY DISORDERS ARE INDEPENDENTLY ASSOCIATED WITH SUICIDE IDEATION AND ATTEMPTS: PROPENSITY SCORE MATCHING IN TWO EPIDEMIOLOGICAL SAMPLES

Michel A. Thibodeau · Patrick G. Welch · Jitender Sareen · Gordon J. G. Asmundson

137 citations0/0 files storedDepression and Anxiety

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Suicide and Self-Harm Studies Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes Mental Health Treatment and Access

Abstract

BACKGROUND: Research suggests that suicidal behavior in individuals with anxiety disorders is attributable to co-occurring risk factors, such as depression. We argue that these conclusions are founded primarily in statistical adjustments that may obscure independent associations. We explored independent associations between specific anxiety disorders and suicide attempts and ideation by means of propensity score matching, a process that simulates a case-control study by creating matched groups that differ in group status (e.g., diagnosis of a specific anxiety disorder) but that are statistically equivalent on observed covariates. METHODS: We made use of the National Comorbidity Survey Replication (NCS-R) and the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), which include a total of 43,935 adults. Diagnoses included agoraphobia without panic disorder, generalized anxiety disorder, panic disorder with or without agoraphobia, posttraumatic stress disorder, social anxiety disorder, and specific phobia. RESULTS: Each anxiety disorder was (95% confidence intervals) associated with increased odds of lifetime suicide attempts (odds ratios 3.57-6.64 [NCS-R], 3.03-7.00 [NESARC]) and suicidal ideation (odds ratios 2.62-4.87 [NCS-R], 3.34-10.57 [NESARC]). Odds ratios for each disorder remained statistically significant after matching on diagnostic status of dysthymia, major depressive disorder, alcohol abuse/dependence, substance abuse/dependence, bipolar disorder I, bipolar disorder II, all other anxiety disorders, and on sociodemographic variables. CONCLUSIONS: This is the first report to present evidence that each anxiety disorder is associated with suicide ideation and suicide attempts beyond the effects of co-occurring mental disorders. These findings warrant consideration in assessment, intervention, and related policies.

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References

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