The amount of a 17-beta-hydroxysteroid dehydrogenase type 1 (human) when measured in cerebrospinal fluid. The trait is level of 17-beta-hydroxysteroid dehydrogenase type 1 (human) in cerebrospinal fluid (OBA_2057138, an Ontology of Biological Attributes term). Also known as: cerebrospinal fluid 17-beta-hydroxysteroid dehydrogenase type 1 (human) amount.