Source:http://linkedlifedata.com/resource/umls/id/C2699193
NCI: The determination of the ratio of total cholesterol compared to high-density lipoprotein type cholesterol present in a sample. The measurement may be expressed as a ratio or percentage.,NCI: A relative measurement (ratio or percentage) of total cholesterol to high-density lipoprotein cholesterol (HDL-C) in a biological specimen.