Diyette Varyasyonun Özelliği
Özet
Toplum içerisinde yaşayan bireylerin besin ögeleri alımında günler arası varyasyon her ne kadar besin ögesine bağlı olarak değişiklik gösterse de sürekli olarak fazla bulunmuştur. Besin ögesi enerji alımına (enerjiye uyarlanmış) bağlı olarak ifade edildiğinde birey içi varyasyonun oranı bireylerarasına göre genellikle fazladır. Kişi başına tek veya az sayıda 24 saatlik hatırlatmaya dayanan diyet alımı ölçümleri, bir grup için ortalamanın doğru (tarafsız) bir tahminini sağlayabilir, ancak standart sapma büyük ölçüde fazla tahmin edilecektir. Ayrıca, epidemiyolojik çalışmalarda korelasyon ve regresyon katsayıları ve relatif riskler gibi ilişkilerin belirlenmesi olası belirlenemeyen noktalar nedeni ile esasen zayıftır.
Referanslar
Beaton, G. H., J. Milner, P. Corey, et al. (1979). Sources of variance in 24-hour dietary recall data: implications for nutrition study design and interpretation. Am J Clin Nutr 32:2546–2549.
Beaton, G. H., J. Milner, V. McGuire, et al. (1983). Source of variance in 24-hour dietary recall data: implications for nutrition study design and interpretation. Carbohydrate sources, vitamins, and minerals. Am J Clin Nutr 37:986–995.
Bhargava, A. (1992). Malnutrition and the role of individual variation with evidence from India and the Phillipines. J R Statist Soc A 155(Part 2):221–231.
Brown, K. H., R. E. Black, and S. Backer. (1982). Seasonal changes in nutritional status and the prevalence of malnutrition in a longitudinal study of young children in rural Bangladesh. Am J Clin Nutr 36:303–313.
Davidsen, L., B. Vistisen, and A. Astrup. (2007). Impact of the menstrual cycle on determinants of energy balance: a putative role in weight loss attempts. Int J Obes (Lond) 31:1777–1785.
el Lozy, M. (1983). Dietary variability and its impact on nutritional epidemiology. J Chron Dis 36:237–249.
Freedman, L. S., R. J. Carroll, and Y. Wax. (1991). Estimating the relation between dietary intake obtained from a food frequency questionnaire and true average intake. Am J Epidemiol 134:310–320.
Hern á ndez-Avila, M., I. Romieu, S. Parra, et al. (1998). Validity and reproducibility of a food frequency questionnaire to assess dietary intake of women living in Mexico City. Salud Publica Mex 40:133–140.
Hunt, W. C., A. G. Leonard, P. J. Garry, et al. (1983). Components of variation in dietary data for an elderly population. Nutrition Res 3:433–444.
Huybrechts, I., D. De Bacquer, B. Cox, et al. (2008). Variation in energy and nutrient intakes among pre-school children: implications for study design. Eur J Public Health 18:509–516.
Jahns, L., A. Carriquiry, L. Arab, et al. (2004). Within- and between-person variation in nutrient intakes of Russian and U.S. children differs by sex and age. J Nutr 134:3114–3120.
Lanigan, J. A., J. C. Wells, M. S. Lawson, et al. (2004). Number of days needed to assess energy and nutrient intake in infants and young children between 6 months and 2 years of age. Eur J Clin Nutr 58:745–750.
Liu, K., J. Stamler, A. Dyer, et al. (1978). Statistical methods to assess and minimize the role of intra-individual variability in obscuring the relationship between dietary lipids and serum cholesterol. J Chron Dis 31:399–418.
Liu, K., R. Cooper, J. McKeever, et al. (1979). Assessment of the association between habitual salt intake and high blood pressure: methodological problems. Am J Epidemiol 110:219–226.
Madonsky, A. (1959). Th e fi tting of straight lines when both variables are subject to error. J Am Statis Assoc 54:173.
Mattson, F. H., B. A. Erickson, and A. M. Kligman. (1972). Eff ect of dietary cholesterol on serum cholesterol in man. Am J Clin Nutr 25: 589–594.
Morgan, K. J., S. R. Johnson, and B. Goungetas. (1987). Variability of food intakes. An analysis of a 12-day data series using persistence measures. Am J Epidemiol 126:326–335.
Nyambose, J., K. G. Koski, and K. L. Tucker. (2002). High intra/interindividual variance ratios for energy and nutrient intakes of pregnant women in rural Malawi show that many days are required to estimate usual intake. J Nutr 132:1313–1318.
Piwoz, E. G., H. Creed de Kanashiro, G. Lopez de Romana, et al. (1994). Within- and between-individual variation in energy intakes by low-income Peruvian infants. Eur J Clin Nutr 48:333–340.
Schaefer, A. E. (1981). “Can nutritional status be determined from consumption or other measures?,” in Assessing Changing Food Consumption Patterns (pp. 207–219). Washington, DC: National Academy Press.
Sempos, C. T., N. E. Johnson, E. L. Smith, et al. (1985). Eff ects of intraindividual and interindividual variation in repeated dietary records. Am J Epidemiol 121:120–130.
Tarasuk, V., and G. H. Beaton. (1991). The nature and individuality of within-subject variation in energy intake. Am J Clin Nutr 54:464–470.
Torres, A., W. Willett, J. Orav, et al. (1990). Variability of total energy and protein intake in rural Bangladesh: implications for epidemiological studies of diet in developing countries. Food Nutr Bull 12:220–228.
U. S. Department of Health, E., and Welfare – Public Health Service – National Center for Health Statistics. (1979). Dietary Intake Source Data, United States, 1971–74 . U. S. Department of Health, Education, and Welfare DHEW Pub No. (PHS) 79–1221.
van Staveren, W. A., P. Deurenberg, J. Burema, et al. (1986a). Seasonal variation in food intake, pattern of physical activity and change in body weight in a group of young adult Dutch women consuming self-selected diets. Int J Obesity 10:133–145.
van Staveren, W. A., P. Deurenberg, M. B. Katan, et al. (1986b). Validity of the fatty acid composition of subcutaneous fat tissue microbiopsies as an estimate of the long-term average fatty acid composition of the diet of separate individuals. Am J Epidemiol 123:455–463.
Willett, W. C., L. Sampson, M. J. Stampfer, et al. (1985). Reproducibility and validity of a semiquantitative food frequency questionnaire. Am J Epidemiol 122:51–65.
Ziegler, R. G., H. B. r. Wilcox, T. J. Mason, et al. (1987). Seasonal variation in intake of carotenoids and vegetables and fruits among white men in New Jersey. Am J Clin Nutr 45:107–114.
