Hemoglobin E to Total Hemoglobin Ratio Measurement (EFO_0009218, an Experimental Factor Ontology entry) is the determination of the ratio of hemoglobin E compared to total hemoglobin present in a sample. The measurement may be expressed as a ratio or percentage. [ NCI ]. Also known as: HGBEHGB, Hemoglobin E/Total Hemoglobin.