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Comparison of nutrient intakes from a detailed inventory to a supplement frequency questionnaire: results from the SURE Study
Author(s) -
Monroe Kristine R,
Murphy Suzanne,
Wilkens Lynne,
Steffen Alana,
Albright Cheryl,
Yonemori Kim,
Morimoto Yukiko
Publication year - 2009
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.23.1_supplement.549.3
Subject(s) - multivitamin , nutrient , medicine , vitamin d and neurology , vitamin , cohort , environmental health , zoology , biology , ecology
The Supplement Reporting (SURE) Study evaluated the most common methods of collecting dietary supplement use data among five racial/ethnic populations participating in the Multiethnic Cohort Study in Hawaii and Los Angeles. Here we compare data from a detailed, full year inventory of supplement use to estimates from a self‐administered supplement frequency questionnaire (SFQ) that asked about multivitamin use, 11 single‐nutrient supplements, as well as fish oil and garlic. Categorical dose range was asked for vitamins C and E only. We present here the overall results for four common components of supplements for 399 subjects who completed the 1‐year study. The percentage of individuals where the difference in the nutrient values between the inventory and the SFQ were larger in absolute value than 20% of the mean inventory value, using logged values, were 21% for folate, 26% for calcium, 33% for vitamin C and 47% for vitamin E. Weighted kappa statistics were 0.48 for folate, 0.50 for vitamin E, 0.58 for vitamin C and 0.59 for calcium. For overall nutrient intakes, providing information on dosage does not appear to have increased the accuracy of the estimates of vitamin C and vitamin E intakes relative to the other two nutrients. We conclude that the SFQ might be used successfully when ranking is important, but may not be the optimal instrument when absolute nutrient intake is required. Supported by NCI grant R01 CA106744.