Construction and validation of a scale to assess knowledge, attitude, and practice regarding vascular protection anticipatory to the creation of an arteriovenous fistula

Abstract

Background: The possibility of creating an arteriovenous fistula (AVF) depends on the existence of an arterial–venous network that is in good condition, defined by the size and elasticity of the blood vessels. The knowledge, attitudes, and practices (KAP) toward vascular protection play a crucial role in preserving the vascular network for patients with end-stage renal disease (ESRD), it is observed that there is a significant lack of tools to measure these variables. Thus, the aim of this study is to develop and validate a scale to assess KAP regarding vascular protection anticipatory to the creation of an arteriovenous fistula (the KAP-VPAC-AVF Scale). Methods: Initial item development was guided by a literature review and clinical experience, after which the items were improved and perfected through the Delphi process. The content of the scale was judged by an expert panel for content validity. In a convenience sample of 551 patients with ESRD, exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted to examine the instrument’s factor structure. Results: The KAP-VPAC-AVF Scale encompasses 11 items distributed over three factors: knowledge, attitude, and practice, demonstrated excellent internal consistency (Cronbach’s alpha = 0.917) and construct validity, as confirmed by CFA with satisfactory fit indices (χ2/ df = 2.394, RMSEA = 0.075, RMR = 0.049, CFI = 0.969, GFI = 0.936, AGFI = 0.892, TLI = 0.957, IFI = 0.970). Conclusion: The KAP-VPAC-AVF Scale is a scientific and effective assessment tool that can evaluate the KAP of ESRD patients regarding measures to preserve the vascular network.