Renal Association Clinical Practice Guideline on Vascular Access for Haemodialysis

Abstract

Grade 2) according to balance of benefits, risk, burden and cost. The quality or level of evidence is assessed as 'high' (Grade A), 'moderate' (Grade B), 'low' (Grade C) or 'very low' (D) depending on factors such as study design, directness of evidence and consistency of results [1][2][3][4].