Postoperative Complications and 30-day Rreadmission in Patients Older than 80 Years with Chronic Kidney Disease after Hip Fracture.

PURPOSE: This study aimed to explore the impact of chronic kidney disease (CKD) on the prognosis of patients older than 80 years after hip fracture. METHODS: This retrospective, observational, single-center study included patients older than 80 years who underwent hip fracture operations between Feburary 2013 to June 2021 at our hospital. Patients were divided into two groups based on the estimated glomerular filtration rate (eGFR): the CKD group [eGFR < 60 mL/(min·1.73m²)] and the non-CKD group. Outcomes were the incidence of in-hospital postoperative infectious and non-infectious complications, 30-day readmission, and in-hospital death. Logistic regression was used to calculate the odds ratio (OR) of CKD on these outcomes. RESULTS: A total of 498 patients were included, 165 in the CKD group and 333 in the non-CKD group. Eighty-seven CKD patients experienced 140 episodes of postoperative complications. In comparison, 114 non-CKD patients had 158 episodes of postoperative complications. CKD patients were more likely to have postoperative complications than non-CKD patients (OR = 2.143, 95% CI: 1.465-3.134, P < 0.001). CKD increased the risk of cardiovascular complications (OR = 2.044, 95% CI: 1.245-3.356, P = 0.004), acute kidney injury (OR = 3.401, 95% CI: 1.905-6.072, P < 0.001), delirium (OR = 2.276, 95% CI: 1.140-4.543, P = 0.024), and gastrointestinal bleeding (OR = 4.151, 95% CI: 1.025-16.812, P = 0.031). The transfusion rate (OR = 2.457, 95% CI: 1.668-3.618, P < 0.001) and incidence of 30-day readmission (OR = 2.426, 95% CI:1.203-4.892, P = 0.011) in CKD patients were higher than those in patients without CKD. CONCLUSION: CKD is associated with poor postoperative outcomes in geriatric hip fracture patients. Special attention should be paid to patients with CKD.