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Methodological Issues in Nutrition Surveillance: The CDC Experience^1,2,

Frederick L. Trowbridge^*, Faye L. Wong, Tim E. Byers and Mary K. Serdula

^* Division of Nutrition Field Services Branch Epidemiology Branch, Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control, Atlanta, GA 30333

Nutrition surveillance systems serve to provide state- and locality-specific data that are useful for the management of public health nutrition programs. Current systems, such as the Pediatric and Pregnancy Nutrition Surveillance Systems coordinated by the Centers for Disease Control (CDC), collect program-based data focused on nutrition problems in infants, children, and pregnant women. These systems provide highly useful information, but also present significant methodological challenges relating to representativeness, quality control, and indicator sensitivity/specificity. As the importance of nutritional risk factors for chronic disease is increasingly recognized, the concept of nutrition surveillance must be expanded beyond maternal and child nutrition to include nutrition-related behaviors and risk factors in adolescents and adults. The Behavioral Risk Factor Surveillance System (BRFSS), coordinated by CDC, collects telephone survey data that include information on nutrition-related issues such as overweight, weight-loss practices, and cholesterol screening. In addition, a school-based surveillance system is being established by CDC in coordination with state education agencies to assess adolescent health behaviors, including nutrition. The operation of these nutrition surveillance systems presents significant methodological issues that must be considered in interpreting and using the data for public health purposes.

KEY WORDS: • nutrition surveillance

¹ Presented as part of a conference, "Nutrition Monitoring and Nutrition Status Assessment", at the first fall meeting of the American Institute of Nutrition, Charleston, South Carolina, December 8–10, 1989. The conference was supported in part by cooperative agreement HPU880004-02-1 with the DHHS Office of Disease Prevention and Health Promotion, the USDA Human Nutrition Information Service, the DHHS National Center for Health Statistics, and the International Life Sciences Institute-Nutrition Foundation.

² The Planning Committee for the meeting consisted of Drs. Helen A. Guthrie, Roy J. Martin, Linda D. Meyers, James A. Olson, Catherine E. Woteki, and Richard G. Allison (ex officio). The symposium papers were edited by a committee consisting of Dr. James Allen Olson (coordinator), Dept. of Biochemistry & Biophysics, Iowa State University, Ames, IA; Dr. Cathy C. Campbell, Division of Nutritional Sciences, Cornell University, Ithaca, NY; Dr. Roy J. Martin, Dept. of Foods & Nutrition, University of Georgia, Athens, GA; and Dr. Catherine E. Woteki, Food & Nutrition Board, National Academy of Sciences, Washington, DC.