Two-Year Course Trajectories of Anxiety Disorders: Do DSM Classifications Matter?
J Clin Psychiatry
© Copyright 2014 Physicians Postgraduate Press, Inc.
Purchase This PDF for $40.00
If you are not a paid subscriber, you may purchase the PDF.
(You'll need the free Adobe Acrobat Reader.)
Receive immediate full-text access to JCP. You can subscribe to JCP online-only ($86) or print + online ($156 individual).
With your subscription, receive a free PDF collection of the NCDEU Festschrift articles. Hurry! This offer ends December 31, 2011.
If you are a paid subscriber to JCP and do not yet have a username and password, activate your subscription now.
As a paid subscriber who has activated your subscription, you have access to the HTML and PDF versions of this item.
Click here to login.
Did you forget your password?
Still can't log in? Contact the Circulation Department at 1-800-489-1001 x4 or send email
Objective: Anxiety disorders have been shown to differ in their course, but it is unknown whether DSM-categories represent clinically relevant course trajectories. We aim to identify anxiety course trajectories using a data-driven method and to examine whether these course trajectories correspond to DSM-categories or whether other clinical indicators better differentiate them.
Method: 907 patients with panic disorder with agoraphobia, panic disorder without agoraphobia , agoraphobia, social phobia, or generalized anxiety disorder according to DSM-IV criteria were derived from a prospective cohort study (Netherlands Study of Depression and Anxiety). Baseline data were collected between September 2004 and February 2007; follow-up data, between October 2006 and March 2009. Latent class growth analysis was conducted, based on symptoms of anxiety and avoidance assessed with the Life Chart Interview covering a 2-year time period. Identified course trajectories were compared with DSM-IV diagnoses and a wider set of predictors.
Results: We identified a class with minimal symptoms over time (41.7%), a moderately severe chronic class (42.8%), and a severe chronic class (15.4%). Panic disorder with agoraphobia (OR = 2.14; 95% CI, 1.48–3.09) and social phobia (OR = 1.97; 95% CI, 1.46–2.68) predicted moderately severe chronicity; panic disorder with agoraphobia (OR = 2.70; 95% CI, 1.66–4.40), social phobia (OR = 2.46; 95% CI, 1.62–3.74), and generalized anxiety disorder (OR = 1.86; 95% CI, 1.23–2.82) predicted a severe chronic course. However, baseline severity, duration of anxiety, and disability better predicted severe chronic course trajectories than DSM-categories. Additionally, partner status, age at onset, childhood trauma, and comorbid depressive disorder predicted chronic courses.
Conclusions: Course of anxiety was pleomorphic with over 40% having a favorable course, thereby questioning the common notion of chronicity of anxiety disorders. Severity, duration of anxiety, and disability were able to better identify severe chronic course trajectories as compared with DSM-IV categories. These findings facilitate the identification of chronic course trajectories of anxiety disorders in clinical care and support current debates on staging and profiling of mental disorders.