Hemoglobin D to Total Hemoglobin Ratio Measurement (Experimental Factor Ontology term EFO_0009217) is the determination of the ratio of hemoglobin D compared to total hemoglobin present in a sample. The measurement may be expressed as a ratio or percentage. [ NCI ]. Also known as: HGBDHGB, Hemoglobin D/Total Hemoglobin.