Phone Coaching and Internet-delivered Weight Loss

Lifespan

Status: Completed

Conditions: Obesity

Treatments: Behavioral: Internet-based weight loss program; Behavioral: Extended phone coaching; Behavioral: Brief phone coaching

Study type: Interventional

Funder types: Other; NIH

Identifiers

NCT03867981

1296020

5R01DK117843 (U.S. NIH Grant/Contract)

Details and patient eligibility

About

The purpose of this study is to examine whether adding phone coaching to an Internet-based weight loss program can improve weight loss outcomes at 4 months and 1 year. All individuals will receive a 4-month, Internet-delivered weight loss program followed by an 8-month Internet-delivered weight loss maintenance program. Some individuals will also be selected to receive either 3 weeks or 12 weeks of phone coaching. Assessments of weight, diet, physical activity, and psychosocial factors will occur at baseline, 4 months, and 1 year.

Full description

All individuals enrolled in this study will receive a 4-month Internet-based weight loss program followed by an 8-month Internet-based weight loss maintenance program. During the first 4 months, each week individuals will be asked to view a 10-15-minute multi-media lesson (one per week). These lessons focus on behavioral principles for changing diet and physical activity behaviors. Participants are also given weight loss, calorie intake, and physical activity goals. They are taught how to self-monitor this information and are instructed to submit it weekly on the study website. Automated, weekly individualized feedback is provided. Following the 4-month weight loss program participants will receive an 8-month weight loss maintenance program. During this time, they will be asked to view monthly video lessons which focus on strategies for successful WL maintenance and instructed to continue to self-monitor weight, calorie intake, and physical activity minutes on the study website for one week per month. Automated, monthly feedback is provided.

In addition to the Internet program described above, some individuals enrolled in this study will be selected to receive phone coaching. Those selected for 'brief' phone coaching will be asked to complete 3 phone calls with a coach between weeks 5-8 of the study and those selected to receive 'extended' phone coaching will be asked to complete 12 phone calls with a coach between weeks 5-16. The first coaching call will be approximately 45 minutes in duration and all subsequent calls will be approximately 15 minutes in duration. The coach will assist participants in developing a meal plan, problem solving around current barriers, and goal setting. Upon completion of all coaching calls participants will have no additional interaction with the coach, but will remain enrolled in the Internet program.

Assessments will occur at baseline, 4, and 12 months.

Enrollment: 452 patients

Sex: All

Ages: 18 to 70 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Age 18-70
• BMI: 25-45 kg/m2
• Regular internet access

Exclusion criteria

• Currently pregnant, <6 months post-partum, nursing, or planning to become pregnant within the next 12 months.
• Current enrollment in a commercial weight loss program or other weight loss research study
• Currently taking weight loss medications
• Previously had bariatric surgery
• Inability to walk 2 blocks without stopping
• Any medical condition for which weight loss, dietary restriction, or physical activity is contraindicated

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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452 participants in 3 patient groups

Internet weight loss + possibility of brief phone coaching

Experimental group

Description:

Participants randomized to this group will receive a 4-month, Internet-delivered weight loss program followed by an 8-month, Internet-delivered weight loss maintenance program. All individuals will be taught behavioral strategies for changing diet and physical activity behaviors via video lessons. Some participants in this group will also be selected to receive a brief period (i.e., once/week for 3 weeks) of phone coaching starting at week 5. The first coaching call will be approximately 45 minutes in duration and remaining calls with be 10-15 minutes. Coaches will problem solve with participants and help them develop an individualized meal plan.

Treatment:

Behavioral: Brief phone coaching

Behavioral: Internet-based weight loss program

Internet weight loss + possibility of extended phone coaching

Experimental group

Description:

Participants randomized to this group will receive a 4-month, Internet-delivered weight loss program followed by an 8-month, Internet-delivered weight loss maintenance program. All individuals will be taught behavioral strategies for changing diet and physical activity behaviors via video lessons. Some participants in this group will also be selected to receive an extended period (i.e., once/week for 12 weeks) of phone coaching starting at week 5. The first coaching call will be approximately 45 minutes in duration and remaining calls with be 10-15 minutes. Coaches will problem solve with participants and help them develop an individualized meal plan.

Treatment:

Behavioral: Extended phone coaching

Behavioral: Internet-based weight loss program

Internet weight loss only

Active Comparator group

Description:

Participants randomized to this group will receive a 4-month, Internet-delivered weight loss program followed by an 8-month, Internet-delivered weight loss maintenance program. All individuals will be taught behavioral strategies for changing diet and physical activity behaviors via video lessons. No participants in this group will receive any phone coaching.

Treatment:

Behavioral: Internet-based weight loss program