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United States Department of Agriculture

Agricultural Research Service

Title: Evaluation of Quality Control Procedures for 24-H Dietary Recalls: Results from the Girls Health Enrichment Multisite Studies.

Authors
item Cullen, Karen
item Watson, Kathy - BAYLOR COLLEGE OF MED
item Himes, John - UNIV OF MINNESOTA
item Baranowski, Thomas
item Rochon, James - DUKE CLINICAL RES INSTIT
item Waclawiw, Myron - NAT HEART,LUNG&BLOOD INST
item Sun, Wanjie - GEORGE WASHINGTON UNIV
item Stevens, Mary - UNIV OF MINNESOTA
item Leachman Slawson, Deborah - UNIV OF MEMPHIS
item Matheson, Donna - STANFORD UNIVERSITY
item Robinson, Thomas - STANFORD UNIVERSITY

Submitted to: Preventive Medicine
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 1, 2004
Publication Date: May 1, 2004
Citation: Cullen K., Watson K., Himes J.H., Baranowski T., Rochon J., Waclawiw M., Sun W., Stevens M., Leachman Slawson D., Matheson D., Robinson T.N. 2004. Evaluation of quality control procedures for 24-h dietary recalls: results from the girls health enrichment multisite studies. Preventive Medicine. 38 supp:S14-S23.

Interpretive Summary: Quality control methods are important in assessing diets. One hundred forty-four 8-10 year old African-American girls at three field centers completed two-24-hour dietary recalls. The dietary recall data were initially reviewed by the dietary interviewer (Phase 1), then by a local lead nutritionist at the field center (Phase 2), then by the Nutrition Coordinating Center (NCC) (Phase 3), and then any differences identified by NCC were reconciled (Phase 4). The agreement of consumption for selected food variables and nutrients between phases was assessed. Only small differences occurred. Most of the differences among phases was due to individual differences in dietary intake. Decisions to review dietary recall data beyond local review should be based on the level of precision and accuracy required for the study outcomes and the availability of financial resources.

Technical Abstract: Quality control methods are key components of dietary assessment, but have rarely been evaluated. One hundred forty-four 8-10-year-old African-American girls at three field centers completed two 24-h dietary recalls at baseline before a pilot weight gain prevention intervention (one recall collected in-person and one by telephone). The dietary recall data were initially reviewed by the dietary interviewer (Phase 1), then by a local lead nutritionist at the field center (Phase 2), and then by the Nutrition Coordinating Center (NCC) (Phase 3); any differences identified by NCC were reconciled (Phase 4). Bland-Altman and generalizability theory methods were used to assess agreement of consumption for selected food variables and nutrients between phases. As a result, only small differences occurred. Quality control procedures primarily reduced the variances of nutrients rather than caused the means to shift. Most of the variability among phases was due to individual level variability in dietary intake. In conclusion, decisions to review dietary recall data beyond local review should be based on the level of precision and accuracy required for the study outcomes and the availability of financial resources.

Last Modified: 8/30/2014
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