Telephone Psychotherapy for Late-Life Generalized Anxiety Disorder (GAD)

Study Overview
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Brief Summary
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The purpose of this study is to determine if cognitive-behavioral therapy (CBT)and supportive therapy delivered by telephone are effective for reducing worry and anxiety in rural older adults with Generalized Anxiety Disorder (GAD).

Detailed Description
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Older adults in rural locations often face significant barriers to treatment, including stigma, transportation, lack of local appropriately trained service providers, and impaired mobility. The proposed treatment is delivered in a workbook format and by telephone, which maximizes its portability. Treatment will be compared with nondirective supportive therapy, a very credible comparison condition equivalent to the intervention in therapist attention. We propose to randomize 88 adults ≥ 60 years with a diagnosis of GAD to either cognitive behavioral therapy delivered by telephone, or nondirective supportive therapy. The 2 primary treatment outcomes are anxiety symptoms as assessed by the Hamilton Anxiety Rating Scale, and worry symptoms as assessed by the Penn State Worry Questionnaire-Abbreviated. The proposed secondary outcomes are depressive symptoms, sleep, disability, and quality of life. Further, mediators and moderators of the treatment effect will also be examined. Mediators include process variables (therapeutic alliance, adherence, participant satisfaction, and treatment credibility) and new psychotropic medication use; moderators include demographic information (age, education, gender, race, income), psychiatric variables (baseline anxiety severity, baseline depressive disorders, baseline psychotropic medication use), medical comorbidity, and therapist assignment. Maintenance of response will be assessed over 6 months. This research has great public health significance, because it is a low-cost intervention with high potential for widespread dissemination, and it targets an underserved group - community-dwelling rural elders - who currently lack effective treatment interventions tailored to their needs.

Official Title
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A Randomized Controlled Trial (RCT)of Cognitive Behavioral Therapy-Telephone (CBT-T) for Late-Life Generalized Anxiety Disorder (GAD)

Conditions
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Generalized Anxiety Disorder

Intervention / Treatment
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* Behavioral: cognitive behavioral therapy
* Behavioral: nondirective supportive therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 60 years GAD Reside in rural county Proficient in English Exclusion Criteria: Current psychotherapy Active alcohol or substance abuse with use within last month Dementia or global cognitive impairment Psychotic symptoms Active suicidal ideation with plan and intent Change in psychotropic medications within last 1 month Significant hearing loss

Ages Eligible for Study
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Minimum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Cognitive behavioral therapy<br>Cognitive-behavioral therapy consists of psychoeducation, relaxation techniques, cognitive therapy, problem-solving, thought stopping, behavioral activation, exposure, coping with pain, sleep, and relapse prevention | Behavioral: cognitive behavioral therapy<br>* weekly individual psychotherapy by telephone for 12 weeks; 4 booster sessions<br>* Other names: CBT;|
| Active Comparator: Nondirective supportive therapy<br>Nondirective supportive therapy consists of providing a warm and accepting environment in which a person can reflect on their experiences, thoughts, and feelings | Behavioral: nondirective supportive therapy<br>* weekly individual psychotherapy by telephone for 12 weeks; 4 booster sessions<br>* Other names: NST;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes From Baseline in Penn State Worry Questionnaire (PSWQ-A) at Week 13 | self-reported severity and frequency of worry the scores range from 8 to 40, with higher scores representing higher severity of worry. Higher scores represent worse outcome. | baseline to week 13 | 
| Changes From Baseline in Hamilton Anxiety Rating Scale (HAM-A) at Week 13 | interviewer-rated severity of anxiety symptoms; the scores range from 0 to 56, with higher scores representing higher severity of anxiety. Higher scores represent worse outcome. | baseline to week 13 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes From Baseline in Beck Depression Inventory (BDI) at 13 Weeks | self report measure of depressive symptoms; scores range from 0 to 63, with a higher score representing higher levels of depressive symptoms Higher scores represent worse outcome. | baseline to week 13 | 
| Pepper Center Tool for Disability (PCT-D) | self report measure of perceived difficulties with mobility and performing basic and advanced activities of daily living; the scale consists of 19 items; scores range from 19 to 114, with higher scores indicating more disability. Higher scores represent worse outcome. | week 13 | 
| Short Form (36) Health Survey (SF-36) to Week 13 | physical and emotional health related quality of life; The SF-36 is a self-report measure of health-related quality of life (HRQL) consisting of 36 items that form 8 subscales: physical functioning, role limitations due to physical health problems, role limitations due to emotional health problems, social functioning, freedom from pain, energy, emotional well-being, and general health perceptions. These 8 subscales are also combined into two domains: the Physical Component Summary (PCS) and the Mental Component Summary (MCS). All of these scales range from 0 (maximum impairment) to 100 (no impairment). A lower score represents worse outcome. | week 13 | 
| Insomnia Severity Index (ISI) | self-report symptoms of insomnia; scores range from 0 to 28 with higher scores indicating greater symptoms of sleep disturbance; higher score represents worse outcomes | week 13 | 
| Changes From Baseline in Generalized Anxiety Disorder-7 (GAD-7) to Week 13 | Diagnostic and Statistical Manual of Mental Disorders, IV edition (DSM-IV0) symptoms of Generalized Anxiety Disorder; scores range from 0 to 24 with higher scores indicating greater symptoms of GAD; higher score represents worse outcome | baseline to week 13 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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anxiety, rural, elderly