In schizophrenic patients with incontinence our previous urodynamic st
udies showed detrusor hyperreflexia in some cases. Many schizophrenic
patients have brain abnormalities similar to those associated with urg
e incontinence and detrusor hyperreflexia in neurological patients. We
therefore propose bladder dysfunction and incontinence as previously
unrecognized neurobiological correlates of schizophrenia. To clarify t
his concept our first step, the present study, was a patient survey fo
r urinary problems. Incontinence was more prevalent in schizophrenic p
atients than in a comparison group of mood disorder patients at the sa
me hospitals. Urge incontinence and leakage of any type were related c
losely to psychiatric diagnosis. These data, like our pilot urodynamic
studies, suggest that incontinence represents detrusor hyperreflexia
in a significant subset of schizophrenic patients. Prospective urodyna
mic studies will be needed to test our proposal directly. (C) 1997 Els
evier Science B.V.