ALB and infection: A total of 15 key factors were selected by the LassoCV method: “age,” “ECOG score,” “osteolytic destruction,” “VCD,” “neutrophil count,” “lymphocyte count,” “monocytes,” “hemoglobin,” “platelet,” “albumin,” “creatinine,” “lactate dehydrogenase,” “affected globulin,” “B2 microglobulin,” and “infection prevention medication.”