Comparison of federal surveillance systems
on three characteristics


System	Population	BMI Assessment	State or local data
National Health and Nutrition Examination Survey (NHANES)	0 to 20 years of age Non-institutionalized US population	Measured Mobile exam centers	No
Pediatric Nutrition Surveillance System (PedNSS)	Primarily < 5 years of age Receive services for low income families	Measured Part of clinic visit	Yes (select)
Youth Risk Behavior Survey (YRBS)	Grades 9 through 12 Attend school	Self report Questionnaire in classroom	Yes (select)
National Survey of Children’s Health (NSCH)	0 to 17 years of age Non-institutionalized US population	Parental report Telephone	Yes