Guadagnin Simone C, Nakano Eduardo Y, Dutra Eliane S, de Carvalho Kênia M B, Ito Marina K
1Post Graduate Program on Human Nutrition, Faculty of Health Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
2Department of Statistics,Institute of Exact Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
Br J Nutr. 2016 Nov;116(9):1546-1552. doi: 10.1017/S000711451600355X. Epub 2016 Oct 25.
Workplace dietary intervention studies in low- and middle-income countries using psychometrically sound measures are scarce. This study aimed to validate a nutrition knowledge questionnaire (NQ) and its utility in evaluating the changes in knowledge among participants of a Nutrition Education Program (NEP) conducted at the workplace. A NQ was tested for construct validity, internal consistency and discriminant validity. It was applied in a NEP conducted at six workplaces, in order to evaluate the effect of an interactive or a lecture-based education programme on nutrition knowledge. Four knowledge domains comprising twenty-three items were extracted in the final version of the NQ. Internal consistency of each domain was significant, with Kuder-Richardson formula values>0·60. These four domains presented a good fit in the confirmatory factor analysis. In the discriminant validity test, both the Expert and Lay groups scored>0·52, but the Expert group scores were significantly higher than those of the Lay group in all domains. When the NQ was applied in the NEP, the overall questionnaire scores increased significantly because of the NEP intervention, in both groups (P<0·001). However, the increase in NQ scores was significantly higher in the interactive group than in the lecture group, in the overall score (P=0·008) and in the healthy eating domain (P=0·009). The validated NQ is a short and useful tool to assess gain in nutrition knowledge among participants of NEP at the workplace. According to the NQ, an interactive nutrition education had a higher impact on nutrition knowledge than a lecture programme.
在低收入和中等收入国家，使用心理测量学上可靠的方法进行的工作场所饮食干预研究很少。本研究旨在验证一份营养知识问卷（NQ）及其在评估工作场所开展的营养教育项目（NEP）参与者知识变化方面的效用。对一份NQ进行了结构效度、内部一致性和区分效度测试。它被应用于在六个工作场所开展的NEP中，以评估互动式或讲座式教育项目对营养知识的影响。在NQ的最终版本中提取了包含23个条目的四个知识领域。每个领域的内部一致性都很显著，库德-理查森公式值>0·60。这四个领域在验证性因素分析中拟合良好。在区分效度测试中，专家组和非专家组的得分均>0·52，但在所有领域中，专家组的得分均显著高于非专家组。当NQ应用于NEP时，由于NEP干预，两组的问卷总分均显著提高（P<0·001）。然而，在总分（P=0·008）和健康饮食领域（P=0·009），互动组的NQ得分增幅显著高于讲座组。经过验证的NQ是一种简短且有用的工具，可用于评估工作场所NEP参与者营养知识的增长情况。根据NQ，互动式营养教育对营养知识的影响高于讲座项目。
