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The development of a questionnaire to test dietitians' practices and knowledge with regard to dietary supplements and fortified foods

University of Cape Town
Publication Date
  • Public Health
  • Education


To develop a questionnaire for evaluating dietitians' knowledge and practices with regard to the use of dietary supplements. A cross-sectional validation study was carried out in two phases, namely 1) questionnaire planning and development and 2) test evaluation. The study sample comprised 48 nurses, 105 dietetic interns and 367 registered dietitians. An expert academic group comprising 9 dieticians with research and teaching experience rated the academic relevance and importance of knowledge questions in an item pool of 355 questions, in order to ensure face and content validity.

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