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자료유형
학술저널
저자정보
저널정보
대한지역사회영양학회 Journal of Community Nutrition Journal of Community Nutrition Vol.4 No.3
발행연도
2002.11
수록면
143 - 150 (8page)

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The Objective of this study is to establish outcome validity for three instruments that asess whether subjects met recommendations for daily servings of fruits and vegetables for "Stage of Change" research. A convenience sample of 294 college students was recruited from introductory nutrition classes at Michigan State University in the Unitied States. To measure serving of fruits and vegetables, separately, three types of methods(self-rated intake, 24-hour recall and food frequency) were used in comparison to the serving from a three-day food record, the criterion used. The outcome validity was assessed based on wether or not at least two servings of fruits and three servings of vegetables were reported. Validity was assessed by sensitivity, to measure the ability to detect low intake, and by specificity, to measure ability to detect adequate intakes. Cohen's kappa was used as well to examine the agreement between the three methods and a three-day food record. The results showed, for fruits, the 24-hour recall had the best agreement(recall : 0.54, self-rated : 0.31, food frequency : 0.29) with a three-day food record for servings comsumed by people in pre-action or post-action stages. Sensitivity for fruit was also best using a recall(0.81). For vegetables, however, all three methods had low agreement(food frequency : 0.27, recall : 0.21, self-rated : 0.17) with the results of the three-day food record. Self-rated intakes for vegetables had the best sensitivity(0.66) and the food frequency had the best specificity(0.73). Therefore, researcher can use the 24-hour recall method to identify people who consume inadequate serving of fruit. Th detect adequate vegetable intake, the food frequency was best of the three methods. Accuaracy may be improved by probing for vegetables in mixed dishes and on sandwiches. (J Community Nutrition 4(3) : 143~150, 2002)

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