ALB and chronic kidney disease: Figure 2 shows that albumin, age, and BUN are the first three influencing characteristics. The SHAP value in the graph shows more information. Among them, albumin/age/BUN has the most crucial and positive effect, which means that a larger eigenvalue brings a greater probability of occurrence. However, albumin had the highest negative impact. In addition, increasing age is associated with the risk of CKD. In general, the red bar in Figure 2 has a positive correlation coefficient, while the blue bar has a negative correlation coefficient.