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KMID : 0381020120450040390
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Korean Journal of Nutrition
2012 Volume.45 No. 4 p.390 ~ p.399
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Development of a Nutrition Quotient (NQ) equation modeling for children and the evaluation of its construct validity
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Kim Hae-Young
Kwon Se-Hyug
Lee Jung-Sug
Choi Young-Sun
Chung Hae-Rang
Kwak Tong-Kyung
Park Ju-Yeon
Kang Myung-Hee
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Abstract
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The objective of this study was to develop and evaluate the construct validity of a Nutrition Quotient (NQ) for children. In a previous report (Kang, et al., 2012), the food behavior checklist for children’s NQ, consisting of 19 items, was grouped into a 5-factor structure according to the exploratory factor analysis: balance, diversity, moderation, regularity, and practice. In this study, the construct validity of the NQ was assessed using a confirmatory factor analysis. Elementary school students (n = 1,393) from six large cities completed the NQ test. Indicator tests suggested an adequate model fit (goodness of fit index = 0.9613; adjusted GFI = 0.95; standardized root mean square residual = 0.0464; chi-square test statistics of < 0.001 p-value, 82.1), and item loadings were significant for all subscales (p < 0.05). The standardized path coefficients were used as the weights of the items. The NQ and the 5 factor scores of the student were calculated by the obtained weights of the questionnaire items. Logistic regression was applied to find the significant factors in order to affect a specific nutrient status. The receiver operation characteristic curve analyses were performed in order to find diagnostic cut-off points of the five factors. The food behavior checklist for children’s NQ would be a handy and suitable instrument for evaluating dietary behaviors of Korean children.
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KEYWORD
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nutrition quotient, children, construct validity, dietary behavior
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