Abstract: This paper studied the relationship between the readmission rate of diabetic patients and its related eigenvectors. The diagnostic model was made by ridge regression and linear fitting. The relationship between the readmission rate and its corresponding characteristic variables was obtained by stepwise regression. The analysis of model results shows that: the success rate of diabetes treatment in hospitals is 74.32%; insulin and metformin can be used to control diabetes in low and middle income groups; tolazamide can be used to contro...