Reproducibility and Validity of an Expanded Self-Administered Semiquantitative Food Frequency Questionnaire among Male Health Professionals (original) (raw)

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Department of Epidemiology, Harvard School of Public Health

Boston, MA

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Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School

Boston, MA

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Department of Epidemiology, Harvard School of Public Health

Boston, MA

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Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School

Boston, MA

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Department of Epidemiology, Harvard School of Public Health

Boston, MA

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Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School

Boston, MA

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Department of Epidemiology, Harvard School of Public Health

Boston, MA

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Department of Epidemiology, Harvard School of Public Health

Boston, MA

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Channing Laboratory, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School

Boston, MA

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Department of Nutrition, Harvard School of Public Health

Boston, MA.

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Eric B. Rimm, Edward L. Giovannucci, Meir J. Stampfer, Graham A. Colditz, Lisa B. Litin, Walter C. Willett, Reproducibility and Validity of an Expanded Self-Administered Semiquantitative Food Frequency Questionnaire among Male Health Professionals, American Journal of Epidemiology, Volume 135, Issue 10, 15 May 1992, Pages 1114–1126, https://doi.org/10.1093/oxfordjournals.aje.a116211
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Abstract

The authors assessed the reproducibility and validity of an expanded 131-item semiquantitative food frequency questionnaire used in a prospective study among 51, 529 men. The form was administered by mail twice to a sample of 127 participants at a one-year interval. During this interval, men completed two one-week diet records spaced approximately 6 months apart. Mean values for intake of most nutrients assessed by the two methods were similar. Intraclass correlation coefficients for nutrient intakes assessed by questionnaires one year apart ranged from 0.47 for vitamin E without supplements to 0.80 for vitamin C with supplements. Correlation coefficients between the energy-adjusted nutrient intakes measured by diet records and the second questionnaire (which asked about diet during the year encompassing the diet records) ranged from 0.28 for iron without supplements to 0.86 for vitamin C with supplements (mean r = 0.59). These correlations were higher after adjusting for week-to-week variation in diet record intakes (mean r = 0.65). These data indicate that the expanded semiquantitative food frequency questionnaire is reproducible and provides a useful measure of intake for many nutrients over a one-year period. Am J Epidemiol 1992; 135: 1114–26

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© 1992 by The John Hopkins University School of Hygiene and Public Health

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