Translating Cardiovascular Clinical Practice Guidelines on Nutrition Therapy: Validation of the Portfolio Diet Toolkit for Healthcare Providers

Background: Cardiovascular disease (CVD) remains a leading cause of death in Canada. Although the Portfolio Diet, a dietary pattern of cholesterol-lowering foods, is supported by CVD clinical practice guidelines, its uptake in clinical practice remains limited. This study assessed the content and face validity of a healthcare provider (HCP)-facing toolkit (infographic and video), designed to support implementation of the Portfolio Diet. Methods: HCPs were recruited for a 2-round evaluation. They assessed the toolkit using a questionnaire. Content validity of the infographic was assessed using a 4-point Likert scale (1 = irrelevant to 4 = extremely relevant) and face validity of the infographic and video was assessed using a 5-point Likert scale (1 = strongly disagree to 5 = strongly agree). Content-validity indices (CVIs) and face-validity indices (FVIs) were calculated, with ≥ 0.70/1.0 indicating validity. Qualitative feedback informed revisions made between rounds. Conclusions: The toolkit demonstrated strong content and face validity. Repeated assessments and refinement guided by end-user feedback enhanced the toolkit, supporting HCPs in implementing the Portfolio Diet for CVD prevention and management in practice. Clinical Trial Registration: NCT05915455.