The amount of a heparan-sulfate 6-O-sulfotransferase 1 (human) when measured in cerebrospinal fluid. The trait is level of heparan-sulfate 6-O-sulfotransferase 1 (human) in cerebrospinal fluid (OBA_2056226, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid heparan-sulfate 6-O-sulfotransferase 1 (human) amount.