Dietary survey of low-income, rural families in Iowa and North Carolina. III. Contribution of food groups to nutrients.
Percentage contributions of specific food groups indicated in the Basic 4 to protein, calcium, vitamin A, and ascorbic acid in one day's diets of thirty-five Iowa families and twenty-five North Carolina families are reported. All members of the families ate all meals at home. Their diets met or exceeded two-thirds of the 1968 Recommended Dietary Allowances for seven nutrients. Data were collected by the 24-hr. recall method. While the percentage contribution of the meat group to protein intake of the North Carolina families ranged from zero to 84 per cent, that of the Iowa group was from 35 to 85 per cent. The range for the percentage contribution of the milk group to calcium intake of North Carolina families was similar; however, in the Iowa group the range was from 2 to 97 per cent. The vitamin A-rich fruit and vegetable group contributed from zero to 99 per cent for the North Carolina families of vitamin A intake and from zero to 88 per cent for the Iowa group. Ascorbic acid-rich fruits and vegetables contributed from zero to 100 per cent of the ascorbic acid intake of the Iowa group and from zero to 95 per cent in North Carolina families. The results support the argument that the exclusive use of the "Daily Food Guide" or the "Basic 4" to assess nutritional intake of diets may produce biased in formation.
D001205:Ascorbic Acid; D002136:Calcium, Dietary; D003611:Dairy Products; D004034:Diet Surveys; D004044:Dietary Proteins; D005260:Female; D005638:Fruit; D006801:Humans; D007484:Iowa; D008297:Male; D008460:Meat; D009657:North Carolina; D009749:Nutrition Surveys; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D012424:Rural Population; D012959:Socioeconomic Factors; D014675:Vegetables; D014801:Vitamin A
D002136:Calcium, Dietary; D004044:Dietary Proteins; D014801:Vitamin A; D001205:Ascorbic Acid