Catecholamines and diagnoses in children.

Theoretically, noradrenergic (NA) function may be lower in subjects with undersocialized conduct disorder (CDU) and higher in subjects with anxiety/depressive disorder. To test this hypothesis, diagnostic and 24-hour urine catecholamine measures were compared between subjects with plasma dopamine-beta-hydroxylase (D beta H) activities less than 6 mumoles/min/L (low D beta H group) and greater than 15 mumoles/min/L (high D beta H group). Several measures relating to norepinephrine metabolism were lower in the low D beta H group, and the low D beta H group had more diagnoses of CDU and fewer anxiety and depressive disorder diagnoses. Comparisons between clinical and biological measures within each of the D beta H groups were also consistent with the hypothesized relationship between NA function, CDU, and anxiety/depressive disorder.