Objective To explore the relationship between lactate dehydrogenase to albumin ratio(LAR)and short-term prognosis in patients with sepsis-associated acute kidney injury(AKI).Methods A retrospective analysis was conducted on 463 sepsis patients treated in the intensive care unit(ICU)of Beijing Shijitan Hospital,Capital Medical University,from January 2018 to June 2022.The patients were divided into two groups:a group with secondary AKI(AKI group)and the one without acute kidney injury(non-AKI group).Acute Physiology and Chronic Health Evaluation Ⅱ(APACHEⅡ),Sequential Organ Failure Assessment(SOFA),and levels of procalcitonin(PCT),C-reactive protein(CRP),serum creatinine(SCr),lactate dehydrogenase(LDH),and albumin(ALB)were compared between the two groups.Multivariate logistic regression analysis was used to determine prognostic factors for sepsis-associated acute kidney injury,and Receiver Operating Characteristic(ROC)analysis was performed to assess the predictive value of APACHE Ⅱ score,SOFA score,PCT,SCr,and lactate dehydrogenase to albumin ratio(LAR)for short-term prognosis of sepsis-associated acute kidney injury.Results The 28-day mortality rate in the non-AKI group was lower than that in the AKI group,and the length of stay in ICU was shorter in the non-AKI group than in the AKI group(P<0.05).APACHE Ⅱ score,SOFA score,PCT,SCr and LAR were independent influencing factors for 28-days death in patients with sepsis-associated acute kidney injury.The ROC curve analysis showed that LAR level had a higher predictive value for short-term prognosis in patients with sepsis-associated AKI as compared with APACHE Ⅱ score,SOFA score,PCT,and SCr.Conclusions LAR is an independent risk factor for sepsis-associated AKI and is associated with 28-day mortality in patients.