title: Workplace nutrition knowledge questionnaire: psychometric validation and application.
abstract: 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.
authors: 1Post Graduate Program on Human Nutrition, Faculty of Health Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
authors: Simone C
authors: SC
authors: Guadagnin
authors: 2Department of Statistics,Institute of Exact Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
authors: Eduardo Y
authors: EY
authors: Nakano
authors: 3Department of Nutrition, Faculty of Health Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
authors: Eliane S
authors: ES
authors: Dutra
authors: 3Department of Nutrition, Faculty of Health Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
authors: Kênia M B
authors: KM
authors: de Carvalho
authors: 3Department of Nutrition, Faculty of Health Sciences,University of Brasilia,Brasilia,Federal District,70910-900,Brazil.
authors: Marina K
authors: MK
authors: Ito
mesh_terms: D000328:Adult; D001938:Brazil; D002908:Chronic Disease / Q000517:prevention & control; D000072001:Diet, Healthy; D016002:Discriminant Analysis; D004522:Educational Status; D005163:Factor Analysis, Statistical; D005247:Feeding Behavior; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D007318:Inservice Training / Q000379:methods*; D008297:Male; D008875:Middle Aged; D017145:Models, Educational; D052756:Nutritional Sciences / Q000193:education*; D050177:Overweight / Q000178:diet therapy / Q000517:prevention & control*; D011594:Psychometrics; D011795:Surveys and Questionnaires; D017132:Workplace; D055815:Young Adult
keywords:  NCD non-communicable diseases;  NEP Nutrition Education Program;  NQ nutrition knowledge questionnaire;  RMSEA root mean square error of approximation; Nutrition knowledge; Programmes; Psychometric validation; Questionnaires