Environmental Impact on the Efficacy of Two Telecomputer Diet Change Maintenance Interventions Jeff Migneault Boston University School of Medicine Les BodenBoston University School of Public Health Russ LopezBoston University School of Public Health Tim HeerenBoston University School of Public Health

Other Diet Variables: % Fat and Saturated Fat Grams Fiber Overall Diet Quality Servings of Fruits and Vegetables Independent Variables Primary Dependent Variables Goal Systems Variables Inter-goal facilitation inter-goal substitution inter-goal conflict Secondary Dependent Variables The Research Model Intervening Behavioral Variables Self-Efficacy TLC-EAT-extended (Social Cognitive Theory) Control Condition (Assessment only) TLC-GST-extended (Goal Systems Theory)

Study Design T -6 T6T6 Follow-up T0T0 Maintenance Study Begins T 24 Acquisition Intervention Maintenance Intervention T 12 T 18 3 groups: Control SCT Maintenance GST Maintenance all subjects

Environmental Variables of Interest Geocoded Variables Geocoded Variables Distance to Grocery StoresDistance to Grocery Stores Distance to Regular Food SourceDistance to Regular Food Source Fast Food Outlet DensityFast Food Outlet Density Perceived Environmental Variables Perceived Environmental Variables Food AvailabilityFood Availability Food QualityFood Quality Food PriceFood Price

Investigation of Environmental Influences DIET T -6 DIET T DIET T 0 DIET T 06 Environmental Characteristics Acquisition Intervention 2 Maintenance Interventions Long Term Follow-up Cross-Sectional

Investigation of Environmental Influences DIET T -6 DIET T DIET T 0 DIET T 06 Environmental Characteristics Acquisition Intervention 2 Maintenance Interventions Long Term Follow-up Cross-Sectional Self - Efficacy

Investigation of Environmental Influences DIET T -6 DIET T DIET T 0 DIET T 06 Environmental Characteristics Acquisition Intervention 2 Maintenance Interventions Long Term Follow-up Cross-Sectional Moderator of Maintenance Intervention Self - Efficacy

Investigation of Environmental Influences DIET T -6 DIET T DIET T 0 DIET T 06 Environmental Characteristics Acquisition Intervention 2 Maintenance Interventions Long Term Follow-up Cross-Sectional Moderator of Maintenance Intervention Effect on Long-term Maintenance Self - Efficacy