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Centre for Policy on Ageing | |
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Estimation of the use of dietary supplements in the National Diet and Nutrition Survey: people aged 65 years and over
— an observed paradox and a recommendation | | Author(s) | C J Bates, A Prentice, J C van der Pols |
| Journal title | European Journal of Clinical Nutrition, vol 52, 1998 |
| Pages | pp 917-923 |
| Keywords | Diet ; Vitamins ; Clinical surveys. |
| Annotation | As part of the National Diet and Nutrition Survey (NDNS), this study examined the relationships between recorded supplement usage and the biochemical indices of micronutrient status. Of 2600 interviewed, 1467 provided a blood sample and 1217 provided both a blood sample and a complete 4-day diet record. About 20% were in institutions such as nursing homes, and the remainder lived in private households. Subjects were assigned to one of four categories: A, not taking supplements (by questionnaire or by the 4-day record); B, taking supplements (excluding prescribed ones) by questionnaire only; C, taking supplements by 4-day record only; and D, taking supplements by both questionnaire and 4-day record. Categories were compared with respect to estimated total nutrient intakes and blood biochemical indices. Those in B had estimated (4-day) nutrient intakes (from foods and supplements) that were indistinguishable from those in A, but had biochemical indices that indicated significantly higher dietary intakes of several vitamins. Because respondents may change their usual patterns of supplement use during a survey, future survey designs should try to minimise potential sources of inaccuracy or unintentional bias. (RH). |
| Accession Number | CPA-990618203 A |
| Classmark | CFD: CFE: 3G * |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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