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Original Articles

Cost-Effectiveness of Psychotherapy for Cluster C Personality Disorders: A Decision-Analytic Model in The Netherlands

Djøra I. Soeteman, PhD; Roel Verheul, PhD; Anke M. M. A. Meerman, MA; Uli Ziegler, MD; Bert V. Rossum, MA; Jos Delimon, MA; Piet Rijnierse, MD; Moniek Thunnissen, PhD; Jan J. V. Busschbach, PhD; and Jane J. Kim, PhD

Published: October 5, 2010

Article Abstract

Objective: To conduct a formal economic evaluation of various dosages of psychotherapy for patients with avoidant, dependent, and obsessive-compulsive (ie, cluster C) personality disorders (Structured Interview for DSM-IV Personality criteria).

Method: We developed a decision-analytic model to assess the cost-effectiveness of 5 dosages of psychotherapy (ie, long-term outpatient psychotherapy, short-term and long-term day hospital psychotherapy, and short-term and long-term inpatient psychotherapy) over a 5-year time horizon in terms of cost per recovered patient-year and cost per quality-adjusted life-year (QALY). Model parameters were estimated using data from 466 patients with cluster C personality disorders who were admitted to 6 specialist centers of psychotherapy in The Netherlands and assigned to 1 of the 5 treatment groups. Probabilistic analysis was conducted to explore the stability of results over uncertain data ranges. Analyses were conducted from both societal and payer perspectives.

Results: From the societal perspective and below a threshold of €2,637 (US $3,351.92) per recovered patient-year, short-term day hospital psychotherapy resulted in the highest level of benefit for its cost; above the threshold, short-term inpatient psychotherapy was the most cost-effective choice. In terms of cost per QALY, this switch point was at a threshold value of €16,570 (US $21,062.29) per QALY. From the payer perspective, the optimal strategy changed from short-term day hospital psychotherapy to short-term inpatient psychotherapy at threshold values of €9,874 (US $12,550.94) per recovered patient-year and €66,302 (US $84,277.13) per QALY.

Conclusions: This study indicates that short-term day hospital psychotherapy and short-term inpatient psychotherapy are the most cost-effective treatment strategies for patients with cluster C personality disorders. The ultimate selection depends on what cost-effectiveness threshold is considered acceptable and what perspective is adopted.

Trial Registration: controlled-trials.com Identifier: ISRCTN73817429

J Clin Psychiatry

Submitted: March 20, 2009; accepted August 3, 2009.

Online ahead of print: October 5, 2010 (doi:10.4088/JCP.09m05228blu).

Corresponding author: Djøra I. Soeteman, PhD, Viersprong Institute for Studies on Personality Disorders (VISPD), PO Box 7, 4660 AA Halsteren, The Netherlands (DSoetema@hsph.harvard.edu).

Volume: 71

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