Health service costs and clinical gains of psychotherapy for personality disorders: a randomized controlled trial of day-hospital-based step-down treatment versus outpatient treatment at a specialist practice

Elfrida Hartveit Kvarstein, Espen Arnevik, Vidar Halsteinli, Frida Gullestad Rø, Sigmund Karterud, Theresa Wilberg, Elfrida Hartveit Kvarstein, Espen Arnevik, Vidar Halsteinli, Frida Gullestad Rø, Sigmund Karterud, Theresa Wilberg

Abstract

Background: Day-hospital-based treatment programmes have been recommended for poorly functioning patients with personality disorders (PD). However, more research is needed to confirm the cost-effectiveness of such extensive programmes over other, presumably simpler, treatment formats.

Methods: This study compared health service costs and psychosocial functioning for PD patients randomly allocated to either a day-hospital-based treatment programme combining individual and group psychotherapy in a step-down format, or outpatient individual psychotherapy at a specialist practice. It included 107 PD patients, 46% of whom had borderline PD, and 40% of whom had avoidant PD. Costs included the two treatment conditions and additional primary and secondary in- and outpatient services. Psychosocial functioning was assessed using measures of global (observer-rated GAF) and occupational (self-report) functioning. Repeated assessments over three years were analysed using mixed models.

Results: The costs of step-down treatment were higher than those of outpatient treatment, but these high costs were compensated by considerably lower costs of other health services. However, costs and clinical gains depended on the type of PD. For borderline PD patients, cost-effectiveness did not differ by treatment condition. Health service costs declined during the trial, and functioning improved to mild impairment levels (GAF > 60). For avoidant PD patients, considerable adjuvant health services expanded the outpatient format. Clinical improvements were nevertheless superior to the step-down condition.

Conclusion: Our results indicate that decisions on treatment format should differentiate between PD types. For borderline PD patients, the costs and gains of step-down and outpatient treatment conditions did not differ. For avoidant PD patients, the outpatient format was a better alternative, leaning, however, on costly additional health services in the early phase of treatment.

Trial registration: Clinical Trials NCT00378248.

Figures

Figure 1
Figure 1
Longitudinal change of health service costs and global functioning. The figures illustrate the longitudinal course (mixed-model estimations) of health service costs (mean total health service costs: solid black line, mean treatment costs: blue dotted line, and mean emergency costs: red dotted line) with costs (in euros) given on the left Y-axis. The change trajectory for global functioning (given on the right Y-axis) is represented by the black dotted line. Separate figures demonstrate (1) the full sample of patients with different personality disorders (mixed PD) in the step-down (SDC) and the outpatient condition (OPC), (2) patients with borderline PD (BPD), and (3) with avoidant PD (APD) in the two treatment conditions. The point of randomisation is denoted by Time = 0 months.

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Source: PubMed

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