The amount of a 3-hydroxy-3-methylglutaryl-coenzyme A reductase (human) when measured in cerebrospinal fluid. The trait is level of 3-hydroxy-3-methylglutaryl-coenzyme A reductase (human) in cerebrospinal fluid (OBA_2056714, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid 3-hydroxy-3-methylglutaryl-coenzyme A reductase (human) amount.