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Development of a diabetes‐related nutrition knowledge questionnaire for individuals with type 2 diabetes mellitus in Singapore
Author(s) -
Han Chad Y.,
Zheng Xiaomei,
Lee Lin F.,
Chan Cherie G.B.,
Lee Yi Q.,
Zailani Nani A.,
Ng Karin,
Bhaskaran Kalpana
Publication year - 2019
Publication title -
nutrition and dietetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.479
H-Index - 31
eISSN - 1747-0080
pISSN - 1446-6368
DOI - 10.1111/1747-0080.12513
Subject(s) - cronbach's alpha , construct validity , reliability (semiconductor) , intraclass correlation , medicine , test (biology) , internal consistency , diabetes mellitus , content validity , type 2 diabetes mellitus , construct (python library) , clinical psychology , psychology , family medicine , psychometrics , computer science , paleontology , power (physics) , physics , quantum mechanics , programming language , biology , endocrinology
Aim Diabetes‐related nutrition knowledge (DRNK) is essential for the self‐care of patients with type 2 diabetes mellitus (T2DM). A specific tool measuring DRNK can help us to understand awareness levels and tailor structured nutrition education programs. Our study aimed to develop a questionnaire to assess DRNK for individuals with T2DM in Singapore. Methods An expert panel was formed to consolidate in‐depth, culturally suitable, and current information on DRNK. A literature review of diabetes self‐care knowledge questionnaires was performed to outline the scope of the questionnaire and generate a question pool. User friendliness was tested in the first draft of the questionnaire (n = 21). Then, a second draft was tested for item difficulty, discrimination index, and internal consistency (n = 62). The final draft was examined for construct validity and test–retest reliability (n = 100). Results The final questionnaire (four sections: 27 questions) was found to be consistent and reliable. The item difficulty scores of the selected questions ranged from difficult to desirable (2–85). There was fair to good internal consistency (Cronbach's alpha: 0.66, 0.79, 0.56, and 0.78 for Sections 1, 2, 3 and 4, respectively) and construct validity (independent t ‐test: P < 0.001). Questions in the final questionnaire had an average discrimination index of 0.3 (reasonably good). The questionnaire was revealed to have good test–retest reliability (intraclass correlation: 0.82–0.84). Conclusions The DRNK questionnaire is a valid and reliable measure to complement assessment tools measuring self‐efficacy/behaviour in individuals with T2DM living in Singapore.