The amount of a multiple inositol polyphosphate phosphatase 1 (human) when measured in cerebrospinal fluid. The trait is level of multiple inositol polyphosphate phosphatase 1 (human) in cerebrospinal fluid (Ontology of Biological Attributes term OBA_2081685). Also known as: cerebrospinal fluid multiple inositol polyphosphate phosphatase 1 (human) amount.