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Clinical Trial Summary

Dysthymic disorder (DD) denotes chronic depression with fewer symptoms than major depressive disorder (MDD), and it affects ~ 2-4 % of adults with a similar prevalence in the elderly. In the elderly, dysthymic disorder (DD) has been shown to be associated with suffering and disability. The differences between young adult and elderly DD patients indicate that findings obtained in young adults with DD cannot be extrapolated to elderly DD patients who need to be studied separately. Data from epidemiologic studies support this view. In contrast to the data in young adult DD patients, there is a paucity of controlled data on the treatment of elderly DD patients. In our center, a double-masked, placebo-controlled study of 91 elderly DD patients did not find significant superiority for fluoxetine over placebo with response rates of 27.3% for fluoxetine and 19.6% for placebo in intent-to-treat analyses, and response rates of 37.5% for fluoxetine and 23.1% for placebo in completer analyses. Given the relative failure of selective serotonin reuptake inhibitor (SSRIs) to treat geriatric DD effectively, the investigators decided to evaluate the dual reuptake inhibitor, venlafaxine.

The investigators earlier completed an investigator-initiated, open-label 12-week venlafaxine (Effexor XR) trial. Of 23 elderly DD patients, 18 completed the trial. Fourteen (60.9%) were responders in intent-to-treat analyses with the last observation carried forward, and 77.8% were responders in completer analyses. Nearly half the sample (47.8%) met criteria for remission. In the intent-to-treat sample, increased severity of depression at baseline was associated with superior response and the presence of cardiovascular disease was associated with poorer response. These results with venlafaxine indicate that further treatment studies of dual serotonin-norepinephrine reuptake inhibitors like duloxetine are warranted in elderly patients with dysthymic disorder.


Clinical Trial Description

HYPOTHESES:

1. Duloxetine will reduce depressive symptomatology over a period of 12 weeks in elderly DD patients.

2. Duloxetine-treated dysthymic patients will have significant improvement in measures of overall functioning.

This pilot trial enrolled 30 patients ≥ 60 years old with dysthymic disorder. Patients were recruited by clinician referral and by radio or newspaper advertisements that offered free evaluation by experienced clinicians for participation in clinical trials in the Adult and Late Life Depression Clinic at the New York State Psychiatric Institute. After a telephone screen to rule out exclusions for enrollment in the clinic, a psychiatrist conducted a detailed evaluation and completed the Cumulative Illness Rating Scale (CIRS)-Geriatric [CIRS-G]. Patients with a provisional clinical diagnosis of dysthymic disorder were interviewed by a research rater (social worker or nurse) with the Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) Axis I disorders- Patient edition (SCID-P). Based on the psychiatrist's evaluation and the SCID-P interview, a consensus DSM-IV diagnosis was made at a staff conference. ;


Study Design

Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT01852383
Study type Interventional
Source New York State Psychiatric Institute
Contact
Status Completed
Phase Phase 4
Start date January 2006
Completion date March 2013

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