The amount of a interleukin-13 receptor subunit alpha-1 (human) when measured in cerebrospinal fluid. The trait is Ontology of Biological Attributes term OBA_2058381 (level of interleukin-13 receptor subunit alpha-1 (human) in cerebrospinal fluid). Also known as: cerebrospinal fluid interleukin-13 receptor subunit alpha-1 (human) amount.