TY - JOUR
T1 - Development and validation of a knowledge, attitudes and practices questionnaire in the dietary management of irritable bowel syndrome
AU - Belogianni, Katerina
AU - Seed, Paul Townsend
AU - Lomer, Miranda Clare Elizabeth
N1 - Funding Information:
The authors would like to thank dietitian Cherry Hager for her contribution in the generation of the initial pool of question-items.
Publisher Copyright:
© 2023, Crown.
PY - 2023/9
Y1 - 2023/9
N2 - Objective: To develop and validate a questionnaire assessing knowledge, attitudes and practices in the dietary management of IBS. Subjects/Methods: An initial pool of 151 questions was generated addressing three domains (knowledge, attitudes, practices). Academic/senior clinical dietitians (n = 5) provided written feedback and a focus group (n = 4 gastroenterology dietitians) was undertaken to evaluate content and face validity of the question-items. Items considered irrelevant were removed and the refined questionnaire was administered to dietitians with different levels of IBS experience (n = 154) for further psychometric testing. Item reduction analysis was assessed by item difficulty index, discrimination index and point-biserial correlation. Construct validity was assessed via principal component analysis (PCA) and the ‘known-groups’ method. Internal reliability was assessed by Kuder–Richarson Formula 20 and Cronbach’s alpha coefficient and external reliability by interclass correlation coefficient among participants who completed the instrument at baseline and two weeks later (n = 28). Results: Face and content validity resulted in the removal of 61 items from the initial 151 items. Psychometric testing was applied to the refined 90-item questionnaire administered to participating dietitians, resulting in the final 46-item questionnaire. Six factors were extracted by PCA with varimax rotation explaining 59.2% of the total variance. Partial confirmatory factor analysis showed an acceptable model fit (χ2/df = 2.11, CFI = 0.97, TLI = 0.96, RMSEA = 0.08, SRMR = 0.05). Significant differences were found in sum scores among dietitians with different levels of IBS experience. Internal reliability was >0.7 for each factor. External reliability was >0.6 for each factor and >0.7 for overall items of each domain. Conclusion: A validated questionnaire to use in practice and research to assess knowledge, attitudes and practices in the dietary management of IBS has been developed.
AB - Objective: To develop and validate a questionnaire assessing knowledge, attitudes and practices in the dietary management of IBS. Subjects/Methods: An initial pool of 151 questions was generated addressing three domains (knowledge, attitudes, practices). Academic/senior clinical dietitians (n = 5) provided written feedback and a focus group (n = 4 gastroenterology dietitians) was undertaken to evaluate content and face validity of the question-items. Items considered irrelevant were removed and the refined questionnaire was administered to dietitians with different levels of IBS experience (n = 154) for further psychometric testing. Item reduction analysis was assessed by item difficulty index, discrimination index and point-biserial correlation. Construct validity was assessed via principal component analysis (PCA) and the ‘known-groups’ method. Internal reliability was assessed by Kuder–Richarson Formula 20 and Cronbach’s alpha coefficient and external reliability by interclass correlation coefficient among participants who completed the instrument at baseline and two weeks later (n = 28). Results: Face and content validity resulted in the removal of 61 items from the initial 151 items. Psychometric testing was applied to the refined 90-item questionnaire administered to participating dietitians, resulting in the final 46-item questionnaire. Six factors were extracted by PCA with varimax rotation explaining 59.2% of the total variance. Partial confirmatory factor analysis showed an acceptable model fit (χ2/df = 2.11, CFI = 0.97, TLI = 0.96, RMSEA = 0.08, SRMR = 0.05). Significant differences were found in sum scores among dietitians with different levels of IBS experience. Internal reliability was >0.7 for each factor. External reliability was >0.6 for each factor and >0.7 for overall items of each domain. Conclusion: A validated questionnaire to use in practice and research to assess knowledge, attitudes and practices in the dietary management of IBS has been developed.
UR - http://www.scopus.com/inward/record.url?scp=85164464245&partnerID=8YFLogxK
U2 - 10.1038/s41430-023-01306-7
DO - 10.1038/s41430-023-01306-7
M3 - Article
AN - SCOPUS:85164464245
SN - 0954-3007
VL - 77
SP - 911
EP - 918
JO - European Journal of Clinical Nutrition
JF - European Journal of Clinical Nutrition
IS - 9
ER -