Fig. 2

Intraoperative changes in laboratory tests in older adult patients undergoing total joint arthroplasty (A) Hemoglobin, (B) lymphocyte, (C) neutrophil, (D) neutrophil/lymphocyte ratio, (E) platelet/lymphocyte ratio in all patients. EPO, erythropoietin; POD, postoperative day. The whiskers represent the standard error