Invited Commentary: Comparison of Food Frequency Questionnaires
نویسندگان
چکیده
منابع مشابه
Invited commentary: comparison of food frequency questionnaires.
In this issue, Wirfalt et al. (1) provide a useful comparison of three dietary assessment methods among a population of 101 obese women. The essential findings were mean correlations of 0.60 between a modified Willett/Harvard questionnaire and the Block/ National Cancer Institute (NCI) questionnaire, 0.34 between the Block/NCI questionnaire and 3-day recalls, and 0.36 between the Willett/Harvar...
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A paper by Schilling et al. (Am J Epidemiol 2006;164:1141-4) addresses a crucial issue for epidemiologists: limited peer access to questionnaires. This limited access hampers the ability to evaluate and improve the questions used by investigators and, in turn, the quality of some of the self-reported data. The authors of this commentary analyzed recent publications in core epidemiology journals...
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The regulation of circulating peptide hormones has been amenable to study for some four decades now, since the development of radioimmunoassay. The ability to measure these molecules sensitively and specifically revolutionised endocrinology by allowing elucidation of their role in physiology, as well as making possible the diagnosis of diseases of their underand overexpression. It was later fou...
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To the Editors: Kristal et al. (1) contend that the food frequency questionnaire (FFQ) be abandoned in epidemiologic studies of cancer for three reasons: (a) a growing lack of consistency within and across studies of diet and cancer risk; (b) poor correlations between the FFQ’s measure of protein and total energy with urinary nitrogen excretion and doubly labeled water, respectively; and (c) on...
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Positivity, or the experimental treatment assignment assumption, requires that there be both exposed and unexposed participants at every combination of the values of the observed confounders in the population under study. Positivity is essential for inference but is often overlooked in practice by epidemiologists. This issue of the Journal includes 2 articles featuring discussions related to po...
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ژورنال
عنوان ژورنال: American Journal of Epidemiology
سال: 1998
ISSN: 0002-9262,1476-6256
DOI: 10.1093/oxfordjournals.aje.a009600