TABLE 1.

Intervention Components and Operational Assessment of Mediators

Mediation Concept	Didactic Intervention	Family/Peer Activities	Operational Assessment of Mediating Variables
Social support for healthy eating and physical activity	Parent/child reflection: Why is it important to you to be healthy? Setting an example for your child Setting an example for your siblings Parent’s role in healthy eating Importance of teamwork to support exercise habits	Homework assignment: Family discussion on how to help each other be healthy Grocery shopping with parents to prepare a healthy family meal Eating as a family Reading food labels as a family Group exercise class Peer affirmation of positive exercise goals Exercising as a family	The PACE+ Physical Activity and Diet Survey for Adolescents assesses support from family and peers for physical activity and nutrition behaviors. Reliability for support from family ranges from .74 to .76 (ICC = .82) for fruits and vegetables, .77 to .78 (ICC = .67) for dietary fat, .79 (ICC = .79) for physical activity, and .90 (ICC = .93) for physical inactivity. Reliability for support from peers ranges from .74 to .82 (ICC = .43) for fruits and vegetables, .80 to .89 (ICC = .70) for dietary fat, and from .60 to .75 (ICC = .69) for physical activity.
Self-efficacy for healthy eating and physical activity	Child Reflection—what positive lifestyle changes did you make this week? Children’s responsibility for portion control and healthy eating (e.g., responsible snacking) Awareness of what, when, and why we eat Importance of goal setting Discussion of barriers and roadblocks to reaching goals	Weekly reflection on dietary and physical activity goals Develop healthy menu Review progress of monthly physical activity assessments Plan and practice strategies to overcome barriers and setbacks Write 2 to 3 positive affirmations and practice each morning Create a monthly fitness goal Create personal belief statements related to nutrition and physical activity goals	The PACE+ Physical Activity and Diet Survey for Adolescents assesses self-efficacy for eating fruits and vegetables and limiting dietary fat intake, as well as self-efficacy for physical activity. Reliability for fruit and vegetable consumption ranges from .77 to .87 (ICC = .81). Reliability for dietary fat ranges from .90 to .93 (ICC = .79). Reliability for physical activity ranges from .76 to .84 (ICC = .71).

NOTE: PACE = patient-centered assessment and counseling for exercise; ICC = intraclass correlation coefficients.