This study aims to explore the relationship between the Albumin-Corrected Anion Gap (ACAG) and the prognosis of patients with CKD Receiving Percutaneous Coronary Intervention.<h4>Methods</h4>This was a single-center, retrospective study including 973 patients who underwent percutaneous coronary intervention (PCI) at Tianjin Medical University Second Hospital from January 2019 to June 2023, all with an estimated glomerular filtration rate (eGFR) of less than or equal to 60 mL/min/1.73 m<sup>2</sup>. The gene discussed is ALB; the disease is chronic kidney disease.