The amount of a NAD(P)H dehydrogenase [quinone] 1 when measured in blood serum. The trait is Ontology of Biological Attributes term OBA_2042626 (level of NAD(P)H dehydrogenase [quinone] 1 in blood serum). Also known as: blood serum NAD(P)H dehydrogenase [quinone] 1 amount.