Interpersonal psychotherapy versus treatment as usual for PTSD and depression among Sichuan earthquake survivors: a randomized clinical trial

Rui Fang Jiang, Hui Qi Tong, Kevin L Delucchi, Thomas C Neylan, Qijia Shi, Susan M Meffert, Rui Fang Jiang, Hui Qi Tong, Kevin L Delucchi, Thomas C Neylan, Qijia Shi, Susan M Meffert

Abstract

Background: Without effective treatment, PTSD and depression can cause persistent disability in disaster-affected populations.

Methods: Our objective was to test the efficacy of Interpersonal Psychotherapy (IPT) delivered by trained local personnel compared with treatment as usual (TAU) for Posttraumatic Stress Disorder (PTSD) and Major Depressive Disorder (MDD) among adults affected by the Sichuan 2008 earthquake. A small randomized controlled trial of IPT + TAU versus TAU alone was delivered by local mental health personnel in Shifang, China. Between July 2011 and January 2012, 49 adults ≥ 18 years with PTSD, MDD or both were enrolled and randomized to 12 weekly sessions of IPT + TAU (27) or TAU (22) alone x 12 weeks. IPT was then offered to the TAU group. Unblinded follow up assessments were conducted at three and six months. IPT was a 12 session, weekly one hour treatment delivered by local personnel who were trained and supervised in IPT. TAU was continuation of prescribed psychotropic medication (if applicable) and crisis counseling, as needed. MAIN OUTCOME(S) AND MEASURES (S): Clinician Administered PTSD Scale (CAPS) PTSD diagnosis; Structured Clinical Interview for DSM-IV (SCID) for MDD diagnosis. Secondary measures included PTSD/depression symptoms, interpersonal conflict/anger, social support, self-efficacy and functioning.

Results: Using an intent-to-treat analysis, 22 IPT + TAU and 19 TAU participants were compared at three months post-baseline. A significantly greater reduction of PTSD and MDD diagnoses was found in the IPT group (51.9%, 30.1%, respectively) versus the TAU group (3.4%, 3.4%, respectively). Despite the small sample, the estimates for time-by-condition analyses of target outcomes (2.37 for PTSD (p = .018) and 1.91 for MDD (p = .056)) indicate the improvement was better in the IPT + TAU condition versus the TAU group. Treatment gains were maintained at 6 months for the IPT group. A similar treatment response was observed in the TAU group upon receipt of IPT.

Conclusions: This initial study shows that IPT is a promising treatment for reducing PTSD and depression, the two major mental health disorders affecting populations surviving natural disaster, using a design that builds local mental health care capacity.

Trial registration: ClinicalTrials.Gov number, NCT01624935.

Keywords: Depression; Disaster; Domestic violence; Earthquake; Mental health; Posttraumatic stress disorder.

Figures

Figure 1
Figure 1
Flow of participants through study. IPT: Interpersonal Psychotherapy; MDD: Major Depressive Disorder; PTSD: Posttraumatic Stress Disorder; TAU: Treatment As Usual; Tx: Treatment.
Figure 2
Figure 2
PTSD symptoms (CAPS*) and Depression symptoms (BDI*): IPT and TAU. *CAPS symptom scale is 0–600 and BDI symptom scale is 0–63; both are expanded here for visibility. BDI: Beck Depression Inventory; CAPS: Clinician Administered Posttraumatic Stress Disorder (PTSD) Scale; IPT: Interpersonal Psychotherapy; PTSD: Posttraumatic Stress Disorder; SD: Standard Deviation; TAU: Treatment as Usual. 95% confidence intervals shown.

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