Univariate logistic analysis showed that 15 factors, including age, preoperative MMSE, ADL, ACCI, time from injury to surgery, hemoglobin, albumin, hypertension, cardiac interventional therapy history, T2DM, preoperative FBG, exercise capacity, distance walked, use of mobility aid, and stair climbing, were statistically associated with POD in our study (Table 6). Here, ALB is linked to type 2 diabetes mellitus.