Weight Watchers Online 2015

Study Overview
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Brief Summary
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The purpose of this study is to conduct a randomized controlled trial to compare the weight losses produced by the Weight Watchers Online program revised for 2015 (WWO2015) and WWO2015 plus the provision of an electronic scale and weekly email feedback on weight loss (WWO2015 Enhanced), over a 6-month period.

Conditions
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Obesity, Overweight, Body Weight

Intervention / Treatment
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* Behavioral: Weight Watchers Online 2015 Program
* Other: Electronic Scale with Feedback


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 18-70 years Body mass index (BMI) between 27 and 40 kg/m2 Both genders will be recruited; At least 10% of participants will be men. Enrollment of women will be capped at n = 324 (90%) to meet this goal. All ethnic groups will be recruited, with a goal of recruiting 10% minorities English speaking Have access to the Internet via a computer, and basic computer skills Exclusion Criteria: Report health problems that make weight loss or unsupervised exercise unsafe or unreasonable Report a heart condition, chest pain during periods of activity or rest, or loss of consciousness on the Physical Activity Readiness Questionnaire1 Are currently pregnant or breastfeeding, or intend to become pregnant in the next 12 months Are planning to move outside of the state within the next 12 months Report any cognitive or physical limitations that preclude use of a personal computer Have participated in a study conducted by the WCDRC or UT in the past 2 years Have followed a commercial weight-loss program within the previous 6 months or who are currently following a commercial weight loss program Weight loss of ≥ 5% of initial body weight in the last 6 months History of clinically diagnosed eating disorder excluding Binge Eating Disorder. Previous surgical procedure for weight loss Currently taking weight loss medication Treatment of cancer within the last 6 months

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Weight Watchers Online 2015<br> | Behavioral: Weight Watchers Online 2015 Program<br>* Access to the Weight Watchers Online 2015 program available via the Internet on personal computers, tablet computers, and/or smartphones already owned by participants.<br>|
| Experimental: Weight Watchers Online 2015 Enhanced<br> | Behavioral: Weight Watchers Online 2015 Program<br>* Access to the Weight Watchers Online 2015 program available via the Internet on personal computers, tablet computers, and/or smartphones already owned by participants.<br>Other: Electronic Scale with Feedback<br>* Provision of an electronic scale that automatically transmits body weights to the Weight Watchers Online 2015 program, which generates a weekly feedback message on weight loss progress.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change in body weight, measured in kilograms |  | 3 and 6 months after randomization | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Engagement with the electronic intervention system, measured by number of body weights, foods, and physical activity bouts recorded per week |  | 3 and 6 months after randomization |