Cognitive Enhancement Therapy for Early-Stage Schizophrenia

Phase 3

Completed

• Conditions: Schizophrenia
• Interventions: Behavioral: Enriched supportive therapy (EST); Behavioral: Cognitive enhancement therapy (CET)

• Registration Number: NCT00167362
• Lead Sponsor: Beth Israel Deaconess Medical Center

Brief Summary

This study will determine the effectiveness of cognitive enhancement therapy (CET) in treating cognitive abnormalities in people experiencing the early stages of schizophrenia.

Detailed Description

In this study, we wish to determine the neurobiological predictors and the relative efficacy of Cognitive Enhancement Therapy (CET) in ameliorating specific cognitive abnormalities presumably mediated by PFC and related brain structures, among younger, early-course schizophrenia patients who potentially have a better prognosis. A series of recent-onset schizophrenic patients, whose psychotic symptoms have successfully been stabilized on an atypical antipsychotic drug for one year following initiation of treatment, will be randomized to CET combined with an enriched supportive therapy (EST) or EST alone, and treated for two years. Subjects will have been assessed on neurobehavioral and clinical indices immediately prior to beginning CET or EST (corresponding with the CNMD 1-year follow-up) and in the proposed study will again be assessed after 1 and 2 years of psychosocial treatment. In a smaller subset of patients, we will also seek to collect preliminary data on the efficacy of CET in reversing the neurobiological alterations in the PFC. The hypotheses of this study are:

1. The presence of relatively well preserved PFC structure and function (PFC volume, activation with fMRI, and metabolism as measured by proton MRS) at baseline will predict a better response to CET (Neurobiological Prediction Hypothesis).

2. CET combined with "enriched" supportive psychotherapy (EST) will be more effective than EST alone in ameliorating social and non-social cognitive deficits of patients with early schizophrenic illness whose psychotic symptoms have been stabilized on maintenance chemotherapy (The Treatment Efficacy Hypothesis).

3. CET will result in additive, positive effects on neurocognitive parameters that were not observed following one year of antipsychotic medication, using a "sequential" treatment design in a subset of patients in whom we have pre-neuroleptic baseline data from CNMD studies (The Treatment Specificity Hypothesis).

Study Design: Subjects will be randomly assigned, once stabilized clinically, to CET plus EST (n = 30) or EST alone (n = 30) and then treated for up to two years. Clinical, neuropsychological, neurological and functional neuroimaging assessments will be administered at baseline and at two annual follow-ups. At the end of CET or EST treatment, subjects will be asked to come back quarterly to meet informally with either their Cognitive Enhancement Therapy clinicians and former group members, or with their Enriched Supportive Therapy clinician. The purpose of these visits is for us to learn more about the successes that patients have had, or about the difficulties that they might have had since leaving the program. Clinician(s) will also share information obtained during this follow-up which might help patient in overcoming these difficulties. At the end of the one-year period post EST or CET treatment, subjects will be assessed on all measures, except for diagnostic, imaging and blood studies.

Study Timeline

• Study Start: 2001-08
• Study First Submitted: 2005-09-09
• Study First Submitted QC: 2005-09-12
• Study First Posted: 2005-09-14
• Primary Completion: 2009-08
• Study Completion: 2016-12
• Status Verified: 2017-01
• Last Update Submitted: 2017-01-06
• Last Update Posted: 2017-01-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 67

Inclusion Criteria

• DSM-IV diagnosis of schizophrenia, schizoaffective or schizophreniform disorder at the time of initial assessment
• Pre-treatment illness duration an average of 5 years, not to exceed 8 years
• Stable positive symptoms (e.g., if present do not grossly interfere with behavior such as command hallucinations or delusions)
• Currently maintained and compliant with prescribed antipsychotic medication
• Socially and cognitively disabled, e.g., meet criteria on a Cognitive Style Scale (score greater than or equal to 7), and Social Cognition Disability Scale (score greater than or equal to 12).

Exclusion Criteria

• Alcohol/drug abuse or dependence that has significantly interfered with adjustment in the past two months (e.g., patients currently undergoing D and A treatment must successfully complete their recovery program prior to referral)
• Organic brain syndrome, including HIV illness (due to its effect on CNS function)
• IQ below 80 or language skills below the sixth grade level
• Medical contraindications that preclude an appropriate antipsychotic medication
• Persistent suicidality

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
2	Enriched supportive therapy (EST)	Participants will receive enriched supportive therapy
1	Cognitive enhancement therapy (CET)	Participants will receive cognitive enhancement therapy

Primary Outcome Measures

Name	Time	Method
Clinical, neuropsychological, and functional outcomes	Measured at Years 1 and 3

Secondary Outcome Measures

Name	Time	Method
Neuroimaging parameters	Measured at Year 2

Trial Locations

Locations (1)

University of Pittsburgh; 🇺🇸 Pittsburgh, Pennsylvania, United States