American Journal of Epidemiology Vol. 119, No. 3: 323-334
Copyright © 1984 by The Johns Hopkins University School of Hygiene and Public Health
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A COMPARISON OF FREQUENCY AND QUANTITATIVE DIETARY METHODS FOR EPIDEMIOLOGIC STUDIES OF DIET AND DISEASE
1Epidemiology Program, Cancer Center of Hawaii, University of Hawaii 1236 Lauhala Street, Honolulu, HI 96813. (Reprint requests to Dr. L. N. Kolonel)
2Current address: 2361 Liloa Rise, Honolulu, HI 96822.
3Current address: Department of Social Medicine and Public Health, Faculty of Medicine, National University of Singapore, Outram Hill, Singapore 0316.
Chu, S. Y., L. N. Kolonel (Cancer Center of Hawaii, U. of Hawaii, Honolulu, HI 96813), J. H. Hankin and J. Lee. A comparison of frequency and quantitative dietary methods for epidemiologic studies of diet and disease. Am J Epidemiol 1984; 119: 32334.
Agreement between frequency and quantitative dietary methods was assessed for the ability of frequency intake data to substitute for quantitative intake data in diet-disease investigations. Frequency and quantitative Intakes of 342 male subjects participating in an ongoing case-control study in Hawali during 19811982 were obtained using a recall interview method designed to assess usual dietary habits. The extent of agreement between frequency and quantitative intakes of various dietary components (44 food items, 20 food groups, 8 nutrients) was determined at the group and individual subject levels, and with regard to specific study objectives. The results showed that for studies based on aggregate data, frequency and quantitative dietary methods will give reasonably comparable results in analyses Involving food items. However, for similar studies involving food groups and nutrients, and for all studies based on individual data, frequency dietary methods cannot be relied on to yield the same diet-disease associations as would corresponding quantitative methods.
diet; epidemiologic methods; nutrition
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