In these guidelines, in addition to the level of evidence, the level of recommendation has been included, and the categories are evaluated with both. As the Kidney Disease: Improving Global Outcomes (KDIGO) (3) uses the Grading of Recommendations Assessment, Development and Evaluation (GRADE) as a method of evaluating evidence, the Evidence Level Evaluation Committee of the JSDT made considerations (4) and based their method on that. With regard to study design, random controlled trials (RCT) were rated as high, observational studies as low, and all others as very low. Considerations for contents, quality, bias, etc. were given a two-level plus or minus point; in the end, they were divided into four levels, “A–D” (Table 2). “A” may represent high, “C” low, and “D” very low, and plus and minus points assigned accordingly.