Internet Treatment for Weight Loss in Primary Care

Study Overview
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Brief Summary
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This study will test the effectiveness of two distinct treatments for weight loss: Motivational Interviewing Nutritional Counseling. These treatments will be compared to Treatment as Usual. Participants will be recruited through local primary care offices.

Official Title
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Internet Treatment for Weight Loss in Primary Care

Conditions
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Overweight, Obese

Intervention / Treatment
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* Behavioral: Motivational Interviewing
* Behavioral: Nutritional Counseling
* Behavioral: Treatment as usual with primary care physician


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: BMI 25-55 Daily access to internet and phone Exclusion Criteria: Co-existing physical and/or psychiatric conditions that require more significant treatment (e.g., bipolar disorder, psychotic illnesses), and/or require more intensive treatment or hospitalization (e.g., suicidality, severe mood disorders) Meets criteria for current substance abuse or dependence Currently receiving psychiatric, psychological, behavioral, or pharmacologic treatment that is known to affect weight or eating Pregnant, breastfeeding, or plans to become pregnant during the treatment period Cardiac disease, including ischemic heart disease, congestive heart failure, conduction abnormalities, or a history of heart attack Serious neurologic illnesses (e.g., seizure history) or medical illnesses (e.g., impaired hepatic or renal function) Uncontrolled diabetes, thyroid conditions, or hypertension

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 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: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Motivational Interviewing<br> | Behavioral: Motivational Interviewing<br>* 5 sessions of motivational interviewing over a period of 3 months.<br>|
| Active Comparator: Nutritional Counseling<br> | Behavioral: Nutritional Counseling<br>* 5 sessions of nutritional counseling over a period of 3 months.<br>|
| Active Comparator: Treatment as usual<br> | Behavioral: Treatment as usual with primary care physician<br>* Participants will be encouraged to continue their care with their primary care physician.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Body Weight in Pounds. | Body weight lost in pounds measured 1.5 months after first treatment session. | 1.5 months after treatment start (Baseline) | 
| Body Weight in Pounds. | Body weight lost in pounds measured 3 months after first treatment session. | 3 months after treatment start (Baseline) | 
| Body Weight in Pounds. | Body weight lost in pounds measured 6 months after first treatment session (3 month follow-up after active treatment ends). | 6 months after treatment start (Baseline) |