The amount of a cystic fibrosis transmembrane conductance regulator (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes term OBA_2057114 (level of cystic fibrosis transmembrane conductance regulator (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid cystic fibrosis transmembrane conductance regulator (human) amount.