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  • Title: Dietary quality-adherence to the dietary guidelines in Tehranian adolescents: Tehran Lipid and Glucose Study.
    Author: Mirmiran P, Azadbakht L, Azizi F.
    Journal: Int J Vitam Nutr Res; 2005 May; 75(3):195-200. PubMed ID: 16028635.
    Abstract:
    The aim of this study was to determine the Healthy Eating Index (HEI) score and its relation take of nutrients and the number of servings from each food group consumed by adolescents residing in district 13 of Tehran. This study, conducted within the framework of Tehran Lipid and Glucose Study (TLGS), was a part of a dietary intake assessment carried out in 443 families, including 465 adolescents, aged 10-18 years, according to the Food Guide Pyramid and dietary guidelines on individuals residing in district 13 of Tehran. In this study, dietary intake was assessed with two-day 24-hour recalls. HEI was calculated based on nine components. The score range of each component was 0 to 10, the sum score of this index therefore being 90. The HEI score was categorized into three groups: less than 45 (poor diet), between 45-72 (needs improvement) and more than 72 (good diet). The mean score of HEI was 64.9 +/- 9.6 in boys and 64.8 +/- 9.4 in girls. The results showed that the number of servings of food groups in those with good diet was significantly higher than the two other groups (p < 0.05). In contrast the percent of saturated fat intake and cholesterol consumption in those with HEI > or = 72 was lower than the other groups (p < 0.05). The approximate number of food items consumed and the total nutrient intake by adolescents with HEI score > or = 72 was significantly higher than the others (p < 0.05). There was a significant positive correlation between the number of servings of grains group (r = 0.1), vegetables (r = 0.4), fruits (r = 0.4), dairy (r = 0.3), meat (r = 0.1), and HEI (p < 0.001). There was a significant negative correlation between fat intake (r = -0.2, p < 0.001), percent of saturated fatty acids (r = -0.2, p < 0.05), cholesterol consumption (r = -0.4, p < 0.05), and the ratio of polyunsaturated fatty acids/saturated fatty acids (P/S) in diet (r = 0.2, p < 0.05), and HEI score. Seventy-four, 23, and 3% of diets were categorized into "needs improvement", "good", and "poor", respectively. In conclusion, the diets of most Tehranian adolescents need improvement, demonstrating the need for nutrition education in this age group.
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