Cognitive-Behavior Therapy for Insomnia

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE4

Total Enrollment

186 participants

Study Classification

INTERVENTIONAL

Study Start Date

2008-04-30

Study Completion Date

2013-06-30

Brief Summary

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Insomnia is a prevalent public health problem affecting large segments of the population on an occasional, recurrent, or chronic basis. Persistent insomnia is associated with impairments in daytime functioning, reduced quality of life, and increased health-care costs. Despite evidence that cognitive-behavior therapy (CBT) is an effective and well accepted treatment for insomnia, a significant proportion of individuals do not respond adequately to this treatment. Hence, there is a need to identify the active therapy components and mechanisms of change in order to develop more effective therapeutic approaches and optimize outcomes. The specific aims of the proposed study are to (a) evaluate the effects of behavioral versus cognitive therapies for insomnia and associated daytime impairment, (b) investigate the mechanisms of change and, (c) examine the impact of insomnia therapies on psychiatric conditions commonly associated with insomnia (anxiety disorders and depression). A sample of 186 adults with chronic insomnia will be recruited from two sites (Laval University and University of California, Berkeley). Participants will be randomly assigned to one of three groups: (a) behavior therapy (BT; n = 62), (b) cognitive therapy (CT; n = 62), or (c) cognitive-behavior therapy (CBT; n = 62). Measures of outcome (sleep/insomnia, daytime functioning) will be administered at baseline, end of treatment, and at 6- and 12-month follow up. Measures of mechanisms of change (maladaptive sleep habits, unhelpful beliefs, sleep-related worry) will be administered at baseline, after the 4th and 8th therapy sessions, and at the end of treatment. It is expected that (1) BT and CBT will be more effective for improving sleep, relative to CT, (2) CT and CBT will be more effective for reducing daytime functional impairment, relative to BT and (3)CT will be more effective than BT in reducing comorbid psychiatric disorders. The public health significance of the proposed study is that it will provide useful information to improve our understanding of insomnia and to enhance efficacy and efficiency of therapeutic approaches for a prevalent and costly health problem. The long-term objective is to contribute to the development and dissemination of evidence-based treatments for chronic insomnia and its common comorbidities.

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Detailed Description

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Conditions

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Chronic Insomnia

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

SINGLE

Outcome Assessors

Study Groups

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1. Cognitive-Behavior Therapy

Group Type ACTIVE_COMPARATOR

Cognitive-Behavior Therapy

Intervention Type OTHER

Sleep restriction, stimulus control, cognitive therapy

2. Behavior Therapy

Group Type EXPERIMENTAL

Behavior Therapy

Intervention Type OTHER

Sleep restriction and stimulus control

3. Cognitive Therapy

Group Type EXPERIMENTAL

Cognitive Therapy

Intervention Type OTHER

Cognitive restructuring therapy

Interventions

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