Hemoglobin C to Total Hemoglobin Ratio Measurement (EFO_0009216) is the determination of the ratio of Hemoglobin C compared to total Hemoglobin present in a sample. The measurement may be expressed as a ratio or percentage. [ NCI ]. Also known as: HGBCHGB, Hemoglobin C/Total Hemoglobin, Percent Hemoglobin C.