Abstracts of studies concerning DMT and other psychedelics present in urine. Most studies found that schizophrenic patients were no more likely than control to excrete DMT, but this one is interesting:
Studied the excretion of dimethyltryptamine (DMT) in 122 recently admitted psychiatric patients and 20 normal Ss. DMT was detected in the urine of 47% of those diagnosed by their psychiatrists as schizophrenic, 38% of those with other nonaffective psychoses, 13% of those with affective psychoses, 19% of those with neurotic and personality disorders, and 5% of the normal Ss. 99 of the patients were interviewed in a semistandardized fashion, and also categorized according to a variety of operational definitions of the psychoses. The operational definitions failed to reveal any group significantly more correlated with urinary DMT than did the hospital diagnosis of schizophrenia, but a discriminant function analysis of symptomatology could be used to define a group of 21 patients of whom 15 (71%) excreted detectable DMT. There was a general relationship between psychotic symptoms and urinary DMT, but specifically schizophrenic symptoms did not appear to be major determinants of DMT excretion.