Internet Obesity Treatment Enhanced With Motivational Interviewing

Not Applicable

Completed

• Conditions: Obesity
• Interventions: Behavioral: Internet Obesity Treatment; Behavioral: Internet Obesity Treatment with MI; Behavioral: Contingent MI

• Registration Number: NCT01232699
• Lead Sponsor: University of Vermont

Brief Summary

Internet-based weight control programs have been shown effective in producing weight loss, but in-person delivery of behavioral weight control produces significantly greater weight loss than on-line delivery of the same program. Motivational Interviewing has been shown to increase weight loss when delivered as an adjunct to in-person weight loss programs but has not been examined in conjunction with web-based obesity treatment. Therefore, the overall goal of this project is to determine if the addition of on-line Motivational Interviewing to a web-based group behavioral obesity treatment program will augment weight loss outcomes.

Detailed Description

This randomized controlled trial is designed to determine whether weight losses in a group behavioral weight loss intervention conducted over the Internet are increased with the inclusion of individual, online MI sessions. All participants will receive the same online 6-month group-based behavioral weight loss program followed by 12 months of weight maintenance. Overweight and obese adults at two study sties (N=426) will be randomized to (1) Internet intervention; or 2) Internet intervention with individual MI sessions occurring at three month intervals on a fixed schedule (Internet+MI-Fixed). Assessments will be conducted every six months and will include measures of body weight and height, diet and exercise behaviors, Quality of Life, adherence measures (eg., attendance, compliance with self-monitoring), social influence components, motivation, treatment satisfaction, demographic data and descriptive information regarding use of website components. A third arm was added for the final 3 intervention cohorts. All participants received the program as described above with the addition of motivational interviewing contingent on participants' attendance in classes.

Study Timeline

• Study First Submitted: 2010-11-01
• Study First Submitted QC: 2010-11-01
• Study First Posted: 2010-11-02
• Study Start: 2010-12
• Primary Completion: 2014-04
• Study Completion: 2014-04
• Status Verified: 2018-12
• Last Update Submitted: 2018-12-20
• Last Update Posted: 2018-12-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 495

Inclusion Criteria

• must be over 18
• must have a BMI between 18 and 50
• must live within 60 minutes driving distance of University of Arkansas, Little Rock, AR, or University of Vermont, Burlington, Vermont
• must be able to walk for exercise

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Exclusion Criteria

Not provided

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Internet Obesity Treatment	Internet Obesity Treatment	Participants will attend weekly class sessions on line and track food and exercise in an on-line journal.
Internet Obesity Treatment with MI	Internet Obesity Treatment with MI	Participants will attend weekly classes on line, record food and exercise in an on-line journal, and will have no more than 6 individual motivational interviewing sessions.
Contingent MI	Contingent MI	Intervention is the same as for the MI arm, however participants will only receive MI if meeting certain treatment participation conditions.

Primary Outcome Measures

Name	Time	Method
Change in body weight	0	Weights will be taken in street clothes without shoes using a hospital quality digital floor model scale. Height will be taken at baseline using a wall-mounted stadiometer and BMI will be calculated as weight (kg)/height(m2)
Change in Body Weight	18 months

Secondary Outcome Measures

Name	Time	Method
Adherence to Treatment Components	18 months
Motivation Measures	18 months

Trial Locations

Locations (2)

Behavioral Weight Management Program/Univ of Vermont; 🇺🇸 Burlington, Vermont, United States

University of Arkansas for the Medical Sciences; 🇺🇸 Little Rock, Arkansas, United States