Competence to give informed consent for medical procedures.

This study shows that referrals to psychiatry for evaluation for competence to give informed consent generally were made on patients who refused medical treatment. In this sample of referred patients, the only patients found to be incompetent to give informed consent were those with organic brain syndromes. No one with either schizophrenia or depression was found to be incompetent. It is possible that schizophrenic and depressed patients may generally be competent to give informed consent to medical treatment. This finding might be true notwithstanding the fact that many such patients have been found in other studies to be incompetent to consent to voluntary psychiatric treatment. For example, a patient may have delusions that others can read his mind and thoughts, but he still can understand that he needs dialysis for renal failure. Alternatively, it may be relatively rare that an emergency procedure is necessary before a patient's psychosis can be brought under control and consequently internists and surgeons themselves may prefer to wait. The significance of the results is unclear. Because of active interest in the doctrine of informed consent for psychiatric and medical patients by both physicians and attorneys and the few studies within this population, there is a strong need for more study regarding competence to give informed consent. Further study is especially important for psychotic patients for whom psychiatric consultation is not requested.(ABSTRACT TRUNCATED AT 250 WORDS)