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Validation and reproducibility of a semi-quantitative FFQ as a measure of dietary intake in adults from Puerto Rico.
- Source :
- Public Health Nutrition; Oct2015, Vol. 18 Issue 14, p2550-2558, 9p
- Publication Year :
- 2015
-
Abstract
- <bold>Objective: </bold>We aimed to assess the relative validity and reproducibility of a semi-quantitative FFQ in Puerto Rican adults.<bold>Design: </bold>Participants completed an FFQ, followed by a 6 d food record and a second administration of the FFQ, 30 d later. All nutrients were log transformed and adjusted for energy intake. Statistical analyses included correlations, paired t tests, cross-classification and Bland-Altman plots.<bold>Setting: </bold>Medical Sciences Campus, University of Puerto Rico.<bold>Subjects: </bold>Convenience sample of students, employees and faculty members (n 100, ≥21 years). Data were collected in 2010.<bold>Results: </bold>A total of ninety-two participants completed the study. Most were young overweight females. All nutrients were significantly correlated between the two FFQ, with an average correlation of 0·61 (range 0·43-0·73) and an average difference of 4·8 % between them. Most energy-adjusted nutrients showed significant correlations between the FFQ and food record, which improved with de-attenuation and averaged 0·38 (range 0·11-0·63). The lowest non-significant correlations (≤0·20) were for trans-fat, n 3 fatty acids, thiamin and vitamin E. Intakes assessed by the FFQ were higher than those from the food record by a mean of 19 % (range 4-44 %). Bland-Altman plots showed that there was a systematic trend towards higher estimates with the FFQ, particularly for energy, carbohydrate and Ca. Most participants were correctly classified into the same or adjacent quintile (average 66 %) by both methods with only 3 % gross misclassification.<bold>Conclusions: </bold>This semi-quantitative FFQ is a tool that offers relatively valid and reproducible estimates of energy and certain nutrients in this group of mostly female Puerto Ricans. [ABSTRACT FROM AUTHOR]
- Subjects :
- FOOD consumption
MEDICAL sciences
OVERWEIGHT women
STATISTICAL correlation
REPRODUCIBLE research
COMPARATIVE studies
DIET
FOOD habits
INGESTION
RESEARCH methodology
MEDICAL cooperation
NUTRITIONAL assessment
QUESTIONNAIRES
RESEARCH
RESEARCH evaluation
RESEARCH funding
SURVEYS
EVALUATION research
FOOD diaries
Subjects
Details
- Language :
- English
- ISSN :
- 13689800
- Volume :
- 18
- Issue :
- 14
- Database :
- Complementary Index
- Journal :
- Public Health Nutrition
- Publication Type :
- Academic Journal
- Accession number :
- 109455855
- Full Text :
- https://doi.org/10.1017/S1368980014003218