The amount of a cGMP-specific 3',5'-cyclic phosphodiesterase (human) when measured in cerebrospinal fluid. The trait is level of cGMP-specific 3',5'-cyclic phosphodiesterase (human) in cerebrospinal fluid (OBA_2056430). Also known as: cerebrospinal fluid cGMP-specific 3',5'-cyclic phosphodiesterase (human) amount.