ABT Weight Loss Intervention for Adolescents

Focus groups/pre-testing will be conducted to adapt the adult acceptance-based therapy (ABT)
curriculum to adolescents.

Participants will attend 2 baseline visits and adolescents will be randomized to the
in-person ABT weight loss intervention or the self-guided at-home ABT weight loss
intervention.

In-person ABT will include 14 sessions over 6 months. Self-guided at-home ABT will include 14
mailed handouts over 6 months. Information in the handouts will match what is being taught at
the ABT sessions and mailed.

A post-treatment visit and 6-month follow-up visit will occur.

Inclusion Criteria:

- Adolescent between ages 14-19 with overweight or obesity between the 85th and 99th
percentile for sex and age as determined by CDC growth charts

- Parent of adolescent between ages 14-19 with overweight or obesity between the 85th
and 99th percentile for sex and age as determined by CDC growth charts

Exclusion Criteria:

- Known pregnancy or plans to become pregnant in the next 6 months

- Plans to move out of the area in the next 6 months

- Any condition prohibiting physical activity

- Clinical depression

- Autism

- An intellectual disability

- A diagnosis of cardiovascular disease or diabetes

- Have active cancer or cancer requiring treatment in the past 2 years

- Have active or chronic infections (e.g., HIV or TB)

- Have active kidney disease or lung disease

- An eating disorder or substance abuse disorder

- Having recently begun a course of or changed the dosage of any medications known to
affect appetite or body composition

- Weight loss greater than or equal to 5% in the previous 6 months

- If they do not follow the study plan