alexa Anxiety disorders in primary care: prevalence, impairment, comorbidity, and detection.
Psychiatry

Psychiatry

Journal of Depression and Anxiety

Author(s): Kroenke K, Spitzer RL, Williams JB, Monahan PO, Lwe B

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Abstract BACKGROUND: Anxiety, although as common as depression, has received less attention and is often undetected and undertreated. OBJECTIVE: To determine the current prevalence, impairment, and comorbidity of anxiety disorders in primary care and to evaluate a brief measure for detecting these disorders. DESIGN: Criterion-standard study performed between November 2004 and June 2005. SETTING: 15 U.S. primary care clinics. PARTICIPANTS: 965 randomly sampled patients from consecutive clinic patients who completed a self-report questionnaire and agreed to a follow-up telephone interview. MEASUREMENTS: 7-item anxiety measure (Generalized Anxiety Disorder [GAD]-7 scale) in the clinic, followed by a telephone-administered, structured psychiatric interview by a mental health professional who was blinded to the GAD-7 results. Functional status (Medical Outcomes Study Short Form-20), depressive and somatic symptoms, and self-reported disability days and physician visits were also assessed. RESULTS: Of the 965 patients, 19.5\% (95\% CI, 17.0\% to 22.1\%) had at least 1 anxiety disorder, 8.6\% (CI, 6.9\% to 10.6\%) had posttraumatic stress disorder, 7.6\% (CI, 5.9\% to 9.4\%) had a generalized anxiety disorder, 6.8\% (CI, 5.3\% to 8.6\%) had a panic disorder, and 6.2\% (CI, 4.7\% to 7.9\%) had a social anxiety disorder. Each disorder was associated with substantial impairment that increased significantly (P < 0.001) as the number of anxiety disorders increased. Many patients (41\%) with an anxiety disorder reported no current treatment. Receiver-operating characteristic curve analysis showed that both the GAD-7 scale and its 2 core items (GAD-2) performed well (area under the curve, 0.80 to 0.91) as screening tools for all 4 anxiety disorders. LIMITATION: The study included a nonrandom sample of selected primary care practices. CONCLUSIONS: Anxiety disorders are prevalent, disabling, and often untreated in primary care. A 2-item screening test may enhance detection.
This article was published in Ann Intern Med and referenced in Journal of Depression and Anxiety

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