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Validity of energy intake reporting and its association with dietary patterns among 18-45-year old women in Tehran, Iran
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B Rashidkhani *   , M Shaneshin , T Neyestani , A Houshiar rad |
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Abstract: (15161 Views) |
| Background and Objectives: There usually are energy intake reporting errors in dietary assessment methods. Therefore, it is important that such methods be validated for energy intake. In this study, we identified energy intake misreporting among women based on the Goldberg formula [the ratio of reported energy intake (EI) to resting metabolic rate (RMR) measured by indirect calorimetry (EI/RMR)] and compared dietary patterns of all the participants with those of plausible reporters.
Materials and methods: This cross-sectional study included 187 healthy women aged 18 to 45 years. The ratio EI/RMR was used as an indicator of reporting accuracy (EI/RMR<1.35 was considered to represent underreporting, and an EI/RMR≥2.4 as over reporting, of EI). Dietary intake was assessed by a semi-quantitative 125-item food-frequency questionnaire. The food items were classified into 39 food groups. In addition, lifestyle and anthropometric data were gathered using questionnaires. A cluster analysis and ANOVA were used for data analysis.
Results: Under-reporters (n=66), with a low consumption of most food groups, were more likely than plausible reporters (n=107) to be overweight and older. Three dietary patterns, i.e., healthy, unhealthy, and mixed, were identified for all reporters and named according to their most recurrent food groups, while two dietary patterns were determined for plausible reporters, i.e., healthy and unhealthy. The proportion of under-reporters was 16.9% in the healthy cluster, 49.4% in the unhealthy cluster, and 34.7% in the mixed cluster (P<0.01).
Conclusion: Individuals may not accurately report dietary intake. Age and body mass index may influence the relative accuracy of energy intake reporting among Iranian women. Researchers conducting dietary pattern studies should consider the possibility of misreporting errors before making decisions about dietary adequacy. |
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| Keywords: Energy intake, Implausible reporters, Iranian women, Semi-quantitative food-frequency questionnaire, Cluster analysis |
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Full-Text [PDF 256 kb]
(3735 Downloads)
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Article type: Research |
Subject:
Food Science
Received: 2009/12/15 | Published: 2009/12/15
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