Comparison of two instruments for quantifying intake of vitamin and mineral supplements: a brief questionnaire versus three 24-hour recalls.

@article{Murphy2002ComparisonOT,
  title={Comparison of two instruments for quantifying intake of vitamin and mineral supplements: a brief questionnaire versus three 24-hour recalls.},
  author={Suzanne P. Murphy and Lynne Ross Wilkens and Jean H. Hankin and Janet A Foote and Kristine R Monroe and Brian E. Henderson and Laurence N. Kolonel},
  journal={American journal of epidemiology},
  year={2002},
  volume={156 7},
  pages={669-75}
}
Although methods of collecting food intake data have been studied intensively, there have been fewer investigations into the collection of supplement intake data. Use of eight types of vitamin and mineral supplements was reported between 1994 and 1997 by 2,377 subjects participating in a calibration substudy of the Hawaii-Los Angeles Multiethnic Cohort Study. Subjects gave information on supplement use as part of a dietary questionnaire (administered twice) and during three 24-hour dietary… CONTINUE READING

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