Weight Watchers Online

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 (WWO) and WWO plus the Philips ActiveLink physical activity system, over a 1-year period, compared to a control group.

Official Title
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Weight Watchers Online

Conditions
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Obesity, Overweight

Intervention / Treatment
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* Behavioral: Weight Watchers Online Program
* Device: Philips ActiveLink
* Behavioral: Eating and Activity Newsletter


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Body mass index (BMI) between 27 and 40 kg/m2 All ethnic groups will be recruited 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 Questionnaire 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: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Weight Watchers Online<br> | Behavioral: Weight Watchers Online Program<br>* Access to the Weight Watchers Online program available via the Internet on personal computers, tablet computers, and smartphones.<br>|
| Experimental: Weight Watchers Online + ActiveLink<br> | Behavioral: Weight Watchers Online Program<br>* Access to the Weight Watchers Online program available via the Internet on personal computers, tablet computers, and smartphones.<br>Device: Philips ActiveLink<br>* Provision of a key-chain sized physical activity monitor that interfaces with the Weight Watchers website to promote exercise and give feedback on progress towards exercise goals.<br>|
| Active Comparator: Internet Delivered Eating and Activity Program<br> | Behavioral: Eating and Activity Newsletter<br>* General information on healthy eating and physical activity habits and the medical consequences of overweight/obesity and weight loss.<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, 6, 9, and 12 months after randomizaiton | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Engagement with the electronic intervention system | The frequency with with participants interact with the Weight Watchers Online and control group websites. | 3, 6, 9, and 12 months after randomization | 
| Blood pressure |  | 3, 6, 9, and 12 months after randomization |