The amount of a 3-ketoacyl-CoA thiolase, peroxisomal when measured in blood serum. The trait is Ontology of Biological Attributes identifier OBA_2040466 (level of 3-ketoacyl-CoA thiolase, peroxisomal in blood serum). Also known as: blood serum 3-ketoacyl-CoA thiolase, peroxisomal amount.