Evaluating the Relationship Between Physical Activity, Diet, Weight, and the Neighborhood Environment for Adolescents

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00608036
Recruitment Status : Completed
First Posted : February 6, 2008
Last Update Posted : December 9, 2015
National Heart, Lung, and Blood Institute (NHLBI)
Information provided by (Responsible Party):
Dr. James Sallis, University of California, San Diego

Brief Summary:
Many teenagers have unhealthy eating habits and do not get enough physical activity. This study will examine whether the neighborhood in which a teenager lives affects his/her quality of life, physical activity levels, and eating habits.

Condition or disease

Detailed Description:

Obesity is an increasingly important health problem in the United States, particularly among adolescents. Previous studies among adults have shown that people who live in neighborhoods with good "walkability" and recreational environments have increased physical activity levels, and some studies have suggested that there is a relationship between the neighborhood food environment and eating patterns. While these concepts have been studied in adults, more research is needed on the effect of the neighborhood environment on adolescents. In this study, adolescents who live in select neighborhoods in Seattle-King County, WA and Baltimore-Washington, DC will be enrolled. Forty-eight neighborhoods in these areas will be studied, with researchers taking into account the neighborhoods' walkability levels (e.g., combination of street connectivity, residential density, land use mix, retail floor area ratio) and median income levels. Study researchers will examine and create formulas to measure walkability, pedestrian infrastructure, public recreation space, and nutrition environment quality. Researchers will also examine crime and weather patterns; psychosocial variables; parent support; and perceived neighborhood, school, and home environments. Overall, this study will evaluate the ability of a research model to explain the variation in physical activity levels, sedentary behavior, dietary patterns, and weight among adolescents, with an emphasis on neighborhood environment.

There will be no study visits for this study: participation will take place entirely through the mail, phone, or internet. Participants will include adolescents between the ages of 12 and 16 years old and their parents, all of whom live in the identified study neighborhoods. At the time of study entry, adolescents will complete a questionnaire on neighborhood and safety issues, diet, physical activity habits and places where activity occurs, grades, school policies and parental rules that affect physical activity and eating, and the support they get from people regarding healthy eating and physical activity. One parent of each adolescent will also complete a neighborhood information questionnaire. Adolescents will measure their height, weight, and waist circumference and send the measurements to study staff along with the questionnaire. Next, a 4-week period, study staff will call adolescents on three random days and collect information on their diet in the previous 24 hours. During this period, adolescents will wear an activity meter and a GPS monitor for 7 consecutive days and will mail the devices to study staff for analysis.

Study Type : Observational
Actual Enrollment : 954 participants
Observational Model: Ecologic or Community
Time Perspective: Prospective
Official Title: Ecological Analysis of Activity, Eating, and Weight in Adolescents
Study Start Date : May 2008
Actual Primary Completion Date : December 2010
Actual Study Completion Date : May 2012

Primary Outcome Measures :
  1. Physical Activity measured with accelerometer [ Time Frame: Time 1 ]

Secondary Outcome Measures :
  1. Diet measured with 24 hour dietary recall interviews [ Time Frame: Time 1 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   12 Years to 16 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Participants will be selected from identified neighboorhoods in the Seattle-King County, WA and Baltimore-Washington, DC areas.

Inclusion Criteria:

  • Child is between 12 and 16 years old
  • Child and parent live in identified block group
  • Child and parent speak English
  • Child attends middle school or high school

Exclusion Criteria:

  • Child must not have a diagnosed thought disorder, suicidality, substance abuse disorder, or other psychological or medical condition that would prevent full participation in the study
  • Child must not have a disability or illness that would prevent moderate intensity physical activity
  • Child must not have an eating disturbance indicative of significant eating disorder pathology

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00608036

United States, California
San Diego State University Foundation
San Diego, California, United States, 92103
United States, Washington
Children's Hospital and Regional Medical Center
Seattle, Washington, United States, 98105
Sponsors and Collaborators
Dr. James Sallis
National Heart, Lung, and Blood Institute (NHLBI)
Principal Investigator: James F. Sallis, PhD San Diego State University

Responsible Party: Dr. James Sallis, Distinguished Professor, Department Family and Preventive Medicine, University of California, San Diego Identifier: NCT00608036     History of Changes
Other Study ID Numbers: 527
R01HL083454 ( U.S. NIH Grant/Contract )
First Posted: February 6, 2008    Key Record Dates
Last Update Posted: December 9, 2015
Last Verified: December 2015

Keywords provided by Dr. James Sallis, University of California, San Diego:
Physical Activity
Quality of Life
Ecological Analysis
Dietary Patterns
Weight Status
Neighborhood Environment
Food Environment
Recreation Environment