serum total cholesterol level calculated serum high density lipoprotein cholesterol level serum high density lipoprotein cholesterol level to serum total cholesterol level ratio 2019-01-22T15:16:22Z A calculated measurement in which the amount of HDL cholesterol in a specified volume of serum is divided by the amount of total serum cholesterol, without taking into account any association with other molecules such as lipoproteins, in a specified volume of serum, in the same sample, and presented as a ratio, fraction, quotient or percentage. CMO:0003009 VT:0000180 clinical_measurement_ontology sjwang