center for child health, behavior and development school and community-based approaches for physical...
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Center for Child Health, Behavior and Development
Center for Child Health, Behavior and Development
School and community-based approaches for physical activity and nutrition interventions
Jan 2015; Nutritional Sciences Program
Research Overview
Jason A. Mendoza, MD, MPHAssociate Professor of PediatricsUniversity of Washington
Center for Child Health, Behavior and Development
Cluster RCT of the WSB program
Long-term, efficacy trial, 2012-2017• n=22 schools and n=400+ students
• 4 schools in Year 1
• 6 schools each in Years 2-4
• 3rd-5th graders
• low income schools, matched by school SES and ethnicity
Intervention: WSB program led by staff• offered 5 days/week, students decide when to walk
• start Sept/Oct and end in April/May of each study year
Center for Child Health, Behavior and Development
Walking school bus
A group of children led to school by parents/adults who walk together along a set route (active commuting)
Addresses safety concerns: supervised period of physical activity and pedestrian safety teaching
Pedestrian safety is modeled and taught
Center for Child Health, Behavior and Development
Cluster RCT of the WSB program
Primary outcome: weekly rate of ACS
Secondary outcomes• MVPA (accelerometers)
• BMI z-score
• Pedestrian safety behaviors
Moderators and mediators• Walkability/built environment (Chanam Lee, Texas A&M and Anne
Vernez Moudon, University of Washington)
• Parent/child self-efficacy and parent outcome expectations
Partners: Seattle & Federal Way Public Schools, Feet First
Center for Child Health, Behavior and Development
Pilot Bicycle Train RCT
Specific Aims:1. Validate algorithms examining concurrent accelerometry and GPS
data to measure children’s physical activity intensity and duration while cycling vs. heart rate monitoring and direct observation
2. Evaluate among 4th and 5th grade ethnic minority children (n=60) the feasibility of a pilot cluster RCT of a Bicycle Train program
• Recruitment
• Participation
• Barriers/Facilitators
Partners: SPS, Cascade Bicycle Club, Bike Works
Center for Child Health, Behavior and Development
Other research projects
Reducing TV viewing to prevent obesity in Hispanic preschool children
• Current Nutrition MS student, Catherine Karlak, is leading analyses on TV parenting practices
• Thesis: Examining correlates of TV parenting practices among Latino preschoolers in Head Start.
Center for Child Health, Behavior and Development
Other research projects
The role of food insecurity (FI) on CD4+ counts among pediatric HIV+ patients• Adolescents and young adults in Houston, TX
• Mendoza JA, Paul ME, Schwarzwald H, et al. Food Insecurity, CD4 Counts, and Incomplete Viral Suppression Among HIV+ Patients from Texas Children’s Hospital: A Pilot Study. AIDS and Behavior. 2013;17(5):1683-1687
• 2-6 year old children in Gaborone, Botswana• Mendoza JA, Matshaba M, Makhanda J, Liu Y, Boitshwarelo M, Anabwani GM. Food
Insecurity and CD4% Among HIV+ Children in Gaborone, Botswana. Journal of acquired immune deficiency syndromes. 2014;66(4):414-418
• Future studies:
• Cohort study – longitudinal relationship between FI and CD4+ counts
• Intervention stud(ies) to decrease food insecurity and evaluate impact on CD4+ counts
Center for Child Health, Behavior and Development
Other research projects
Title: Food insecurity and clinical outcomes among children with type 1 diabetes mellitus
• Specific Aim: Examine the association of food insecurity with HbA1c and healthcare utilization
• Ancillary study to the SEARCH for Diabetes in Youth study• Data collection ongoing through Spring 2014
Center for Child Health, Behavior and Development
Other research projects
Title: A wearable mHealth device to promote physical activity among adolescents
• Pilot study’s aim is to assess feasibility• Intervention: Fitbit Flex & customized Facebook group page
• Goal: 12k steps/day or gradual increase towards target• Rewards/badges
• Planning to adapt for other populations, e.g. pediatric cancer survivors, teens with ADHD to decrease symptoms
