The amount of a CUB and sushi domain-containing protein 1 (human) when measured in cerebrospinal fluid. The trait is level of CUB and sushi domain-containing protein 1 (human) in cerebrospinal fluid (Ontology of Biological Attributes id OBA_2080537). Also known as: cerebrospinal fluid CUB and sushi domain-containing protein 1 (human) amount.