Medical University of South Carolina, Charleston, SC
Medical University of South Carolina, Charleston, SC.
J Nurs Meas. 2020 Aug 1;28(2):E98-E138. doi: 10.1891/JNM-D-18-00099. Epub 2020 May 19.
Poor dietary practices are linked to many chronic diseases. The purpose of this validation study was to develop a psychometrically sound instrument that can be administered by health practitioners to measure dietary barriers.
The Dietary Health Status (DHS) instrument, designed to measure dietary barriers is comprised of items in the National Health and Nutrition Examination Survey-What We Eat in America datasets. Content validity was established for DHS using an expert review process. Principal component analysis (PCA) was then used to assess validity and reliability as determined by Cronbach's alpha values.
The PCA supported a 10-component solution, explaining 61% of the total variance. Cronbach's alpha was .67 for the entire instrument, ranging from .55 to .87 for the 10 subscales.
Results suggest the instrument had sufficient construct and internal validity. This exploratory study is an important first step in validating the DHS instrument.
不良的饮食习惯与许多慢性疾病有关。本验证研究的目的是开发一种具有良好心理测量学特性的工具，以便由医疗从业者进行管理，以测量饮食障碍。
设计用于测量饮食障碍的膳食健康状况（DHS）工具包含在国家健康和营养检查调查-我们在美国吃什么的数据集中的项目。使用专家审查过程来建立 DHS 的内容有效性。然后使用主成分分析（PCA）来评估有效性和可靠性，方法是通过 Cronbach 的 alpha 值来确定。
PCA 支持 10 个组成部分的解决方案，解释了总方差的 61％。整个工具的 Cronbach 的 alpha 值为.67，10 个子量表的范围为.55 到.87。
结果表明该工具具有足够的结构和内部有效性。这项探索性研究是验证 DHS 工具的重要的第一步。
