Kelly J Brunst1, Srimathi Kannan2, Yu-Ming Ni3, Chris Gennings4, Harish B Ganguri5, Rosalind J Wright6,7. 1. Kravis Children's Hospital, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY, 10029, USA. kelly.brunst@mssm.edu. 2. Human Nutrition and Dietetics, College of Agricultural Sciences, Southern Illinois University, 1205 Lincoln Drive, Carbondale, IL, 62901, USA. srimathik@gmail.com. 3. New York Medical College, 40 Sunshine Cottage Road, Valhalla, NY, 10595, USA. Yuming_Ni@nymc.edu. 4. Department of Preventive Medicine, Icahn School of Medicine at Mount Sinai, 17 East 102nd Street, New York, NY, 10029, USA. chris.gennings@mssm.edu. 5. Department of Computer Science, College of Science, Southern Illinois University, 1205 Lincoln Drive, Carbondale, IL, 62901, USA. harishganguri78@gmail.com. 6. Kravis Children's Hospital, Department of Pediatrics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY, 10029, USA. rosalind.wright@mssm.edu. 7. Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, 1428 Madison Avenue, New York, NY, 10029, USA. rosalind.wright@mssm.edu.
Abstract
OBJECTIVE(S): To validate the Block98 food frequency questionnaire (FFQ) for estimating antioxidant, methyl-nutrient and polyunsaturated fatty acids (PUFA) intakes in a pregnant sample of ethnic/racial minority women in the United States (US). METHODS: Participants (n = 42) were from the Programming of Intergenerational Stress Mechanisms study. Total micronutrient intakes from food and supplements was ascertained using the modified Block98 FFQ and two 24-h dietary recalls collected at random on nonconsecutive days subsequent to completion of the FFQ in mid-pregnancy. Correlation coefficients (r) corrected for attenuation from within-person variation in the recalls were calculated for antioxidants (n = 7), methyl-nutrients (n = 8), and PUFAs (n = 2). RESULT(S): The sample was largely ethnic minorities (38 % Black, 33 % Hispanic) with 21 % being foreign born and 41 % having less than or equal to a high school degree. Significant and adequate deattenuated correlations (r ≥ 0.40) for total dietary intakes of antioxidants were observed for vitamin C, vitamin E, magnesium, and zinc. Reasonable deattenuated correlations were also observed for methyl-nutrient intakes of vitamin B6, betaine, iron, and n:6 PUFAs; however, they did not reach significance. Most women were classified into the same or adjacent quartiles (≥70 %) for total (dietary + supplements) estimates of antioxidants (5 out of 7) and methyl-nutrients (4 out of 5). CONCLUSIONS: The Block98 FFQ is an appropriate dietary method for evaluating antioxidants in pregnant ethnic/minorities in the US; it may be less efficient in measuring methyl-nutrient and PUFA intakes.
OBJECTIVE(S): To validate the Block98 food frequency questionnaire (FFQ) for estimating antioxidant, methyl-nutrient and polyunsaturated fatty acids (PUFA) intakes in a pregnant sample of ethnic/racial minority women in the United States (US). METHODS:Participants (n = 42) were from the Programming of Intergenerational Stress Mechanisms study. Total micronutrient intakes from food and supplements was ascertained using the modified Block98 FFQ and two 24-h dietary recalls collected at random on nonconsecutive days subsequent to completion of the FFQ in mid-pregnancy. Correlation coefficients (r) corrected for attenuation from within-person variation in the recalls were calculated for antioxidants (n = 7), methyl-nutrients (n = 8), and PUFAs (n = 2). RESULT(S): The sample was largely ethnic minorities (38 % Black, 33 % Hispanic) with 21 % being foreign born and 41 % having less than or equal to a high school degree. Significant and adequate deattenuated correlations (r ≥ 0.40) for total dietary intakes of antioxidants were observed for vitamin C, vitamin E, magnesium, and zinc. Reasonable deattenuated correlations were also observed for methyl-nutrient intakes of vitamin B6, betaine, iron, and n:6 PUFAs; however, they did not reach significance. Most women were classified into the same or adjacent quartiles (≥70 %) for total (dietary + supplements) estimates of antioxidants (5 out of 7) and methyl-nutrients (4 out of 5). CONCLUSIONS: The Block98 FFQ is an appropriate dietary method for evaluating antioxidants in pregnant ethnic/minorities in the US; it may be less efficient in measuring methyl-nutrient and PUFA intakes.
Entities:
Keywords:
Micronutrients; Minorities; Pregnancy; United States; Validation study
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