Determination of intra- and inter-individual variability and its effect on the number of days required to assess the usual intake of a 1-year-old infant population
| Autor: | M T Ortisi, Roberto Bellù, Marcello Giovannini, Elisabetta Riva |
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| Rok vydání: | 1995 |
| Předmět: |
Male
Time Factors Calorie Epidemiology Population Individuality Margin of error Nutrient Animal science Humans Medicine Food science education Analysis of Variance education.field_of_study business.industry Significant difference Infant Nutrition Surveys Diet Records Calorie intake Food record Italy Pediatrics Perinatology and Child Health Female Infant Food Energy Intake Energy Metabolism business Dietary Cholesterol |
| Zdroj: | Paediatric and Perinatal Epidemiology. 9:98-104 |
| ISSN: | 1365-3016 0269-5022 |
| DOI: | 10.1111/j.1365-3016.1995.tb00122.x |
| Popis: | Summary. Diet variability influences the accuracy of the assessment of the relationship between nutrient intake and disease. The present study investigates intra- and inter-individual variability in an infant population at 12 months. The mothers of 79 infants completed a 7-day weighted food record. No significant difference in nutrient intake was observed between males and females. For some nutrients an intra-/inter-individual variability ratio < 1 was found. Adjustment for total calorie intake slightly altered the intra-/inter-individual variability ratio of many nutrients. An error margin of 10% or less for calories can be expected within an 18-day study. Most nutrients however would need to be studied for over 30 days to give an error margin ≤10%. For dietary cholesterol, vitamins A, B6, C, and E, bracketing the error within the 10% margin would require an unrealistic time frame. Adjustments for calorie intake reduced the number of days in the dietary record for some nutrients. A lower intra/inter-individual variability ratio was seen when data for adults and older infants were compared. |
| Databáze: | OpenAIRE |
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