The present study found that elderly patients with a greater degree of diabetes complications were more likely to have 30-day readmissions compared with patients without any diabetes complications. The case managers can coordinate post-discharge visits not only with the primary care physician but also with endocrinologists and cardiologists. Although the findings of the present study have highlighted variables that were associated with high risk of 30-day readmission, comprehensive discharge planning that includes these variables may be important in reducing 30-day readmissions.29