Corrected reticulocyte count and RPI for anemia workup.
Corrected retic = Retic% × (Patient Hct / Normal Hct). RPI = Corrected retic / Maturation factor. RPI ≥ 2: adequate bone marrow response (suggests hemolysis or blood loss). RPI < 2: inadequate response (suggests production defect: iron, B12, folate deficiency, or marrow failure).