Inter- and Intra-individual variation of food and nutrient consumption in a rural Japanese population

Abstract

Objectives: To determine the relative contribution of intra-and inter-individual variation in the consumption of foods and nutrients. Design: Cross-sectional study. Setting: Two rural towns in the Miyagi Prefecture, a northeastern part of Japan. Subjects: Fifty-nine men and sixty women. Methods: Four 3-d food records were collected in four seasons within a year. The total variance in the consumption of 15 nutrient variables and 16 food groups was partitioned by analysis of variance into its interand intra-individual components, separately for men and women. Results: The ratio of the intra-to inter-individual variance was larger than unity in 87% (13a15) of the nutrients in men and 100% (15a15) in women. The ratio was largest for retinol (52.9 in men and I in women) and smallest for carbohydrates (0.8 in men and 1.5 in women). The ratio was larger than unity in 88% (14a16) of the food groups in men and 94% (15a16) in women, which was smallest for cereals (0.6 in men and 0.9 in women). Conclusions:The results were consistent with previous western studies in that intra-individual variation was generally larger than inter-individual variation for the consumption of both foods and nutrients.

Dietary Polyphenol Intake Estimated by 7-Day Dietary Records among Japanese Male Workers: Evaluation of the Within- and Between-Individual Variation

“…However, for polyphenol intake in this study, the between-individual variation was larger and the within-individual/between-individual variance ratio was low (0.90). The CVw and CVb for major nutrient intakes (e.g., protein, fat and carbohydrate) roughly corresponded to previous studies in Japanese populations (24,27,28). For estimating polyphenol intake, the number of days required to rank individuals within a group with r50.9 was 4 d. Ouellette et al examined the within-and between-person variations of macronutrients and antioxidants intakes in U.S. healthy young adults and reported that the minimum number of days required to rank individuals of total flavonoids, isoflavone, and procyanidins were 8, 23, and 7 d, respectively (22).…”

Validation and reproducibility of food frequency questionnaire for Korean genome epidemiologic study

“…Coefficients of variances (CVs) of between-individual variance in our data ranged 7.7-44.7% (mostly about 10-20%), and other Korean studies for college students reported also ranged 15-25% (Chung et al, 1992;Oh et al, 1996;Kwon et al, 2004). Japanese study reported a little bit higher coefficients of between-person variances (13.3-36.2%) than Korean's (Ogawa et al, 1999). However, between-person CVs of Beaton's report for the western diet ranged 17.2-74.9% (mostly 20-50%) for macro nutrients, which appears to be fairly higher than Korean's (Beaton et al, 1979).…”

The Association between Vitamin E Intake and Hypertension: Results from the Re-Analysis of the National Health and Nutrition Survey

“…Thus, the nutrient and food intake results may not be a fair representation of the habitual dietary intake because of a lack of data regarding day-to-day food intake variations. Within-subjects variation has been reported to be larger than the between-subjects variation (28,29), and care should be taken for the interpretation of data from a single-day record. The within-subjects variation/between-subjects variation ratio, however, is reported to be quite high for vitamin A or vitamin B12, but low for vitamin E. Unlike vitamin A or vitamin B12, vitamin E is abundant in a large variety of foods, which could account for the above difference.…”