International Journal of Obesity ( IF 4.2 ) Pub Date : 2020-01-07 , DOI: 10.1038/s41366-019-0510-1 Dalia Mikhail 1 , Barbara Rolls 2 , Kathleen Yost 3 , Joyce Balls-Berry 4 , Margaret Gall 5 , Kristen Blixt 5 , Paul Novotny 6 , Monica Albertie 7 , Michael Jensen 1
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Background/Objectives
Because no validated tool exists to assess nutrition knowledge regarding weight management we developed and tested the Weight Management Nutrition Knowledge Questionnaire (WMNKQ).
Subjects/Methods
The questionnaire assesses nutrition knowledge in these categories: energy density of food, portion size/serving size, alcohol and sugar sweetened beverages, how food variety affects food intake, and reliable nutrition information sources. In total 60 questions were reviewed by 6 experts for face validity and quantitative analysis was used to assess item difficulty, item discrimination, internal consistency, inter-item-correlation, test-retest reliability, construct validity, criterion validity, and convergent validity.
Results
The final WMNKQ contained 43 items. Experts removed 3 of the original 60 questions and modified 41. Eighteen items did not meet criteria for item difficulty, item discrimination, and/or inter-item correlation; 4 were retained. The WMNKQ met criteria for internal consistency (Cronbach's alpha = 0.88), reliability (test-retest correlation ρ = 0.90, P < 0.0001), construct validity (known groups comparison) - dietitians scored 16% better (p < 0.0001) than information technology workers, and criterion validity (pre- to post-intervention improvement in knowledge scores = 11.2% (95% CI 9.8–12.5, p < 0.0001)). Participants younger than age 55 scored significantly better than those over age 55 (convergent validity).
Conclusions
The WMNKQ measures how well nutrition principles of weight management are understood.
中文翻译：
成人体重管理营养知识问卷的开发和验证测试
背景/目标
由于没有经过验证的工具来评估有关体重管理的营养知识，我们开发并测试了体重管理营养知识问卷 (WMNKQ)。
主题/方法
该问卷评估以下类别的营养知识：食物的能量密度、份量/份量、酒精和含糖饮料、食物种类如何影响食物摄入量以及可靠的营养信息来源。共有60个问题由6位专家进行面效评价，并采用定量分析评估项目难度、项目辨别、内部一致性、项目间相关性、重测信度、结构效度、标准效度和收敛效度。
结果
最终的 WMNKQ 包含 43 个项目。专家删除了原来 60 个问题中的 3 个，修改了 41 个。18 个项目不符合项目难度、项目歧视和/或项目间相关性的标准；4个被保留。WMNKQ 符合内部一致性（Cronbach's alpha = 0.88）、可靠性（重测相关性 ρ = 0.90，P < 0.0001）、结构效度（已知组比较）的标准——营养师的得分比信息技术高 16%（p < 0.0001）工人和标准有效性（干预前后知识分数的提高 = 11.2% (95% CI 9.8–12.5, p < 0.0001)）。55 岁以下的参与者得分明显高于 55 岁以上的参与者（收敛效度）。
结论
WMNKQ 衡量对体重管理的营养原则的理解程度。
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