Relation of age to prevalence of tardive dyskinesia.
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Biomedical subjects
Publications and source records attributed to R A Sweet.
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OBJECTIVE: The authors conducted a prospective study of the clinical utility of the four DSM-III-R subtypes of primary degenerative dementia of the Alzheimer type (with delirium, with delusions, with depression, or uncomplicated) and acute psychiatric hospitalization for treatment of these subtypes. METHOD: The subjects were 120 consecutive inpatients with Alzheimer's disease, most of whom had behavioral abnormalities. Each subject received detailed physical, neurological, psychiatric, and mental status examinations. The presence or absence of specific behavioral problems was also documented. Patients were treated with medication, psychotherapy, and behavioral techniques. RESULTS: While all patients could be assigned to one of the four DSM-III-R behavioral subtypes, the uncomplicated subtype did not accurately reflect the burden of behavioral symptoms in the patients who did not have delirium, delusions, or depression. Each behavioral subtype responded in a characteristic way to inpatient treatment, as reflected by changes in scores on four psychometric scales used to assess cognitive impairment, psychiatric symptoms severity, and level of functioning at admission and at discharge, as well as by changes in residential setting following hospitalization. Half of all patients admitted from their homes and two-thirds of those with depression were able to go home following discharge. CONCLUSIONS: Behavioral syndromes in Alzheimer's disease should not be overlooked, because they have both clinical and prognostic significance. Short-term psychiatric hospitalization is effective and efficient for achieving the goal of returning patients to their homes and for safely implementing specific treatments in this frail population, and it may reduce the need for institutionalization.
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Analysis by x-ray fluorescence allows in vitro determination of iodine content of the thyroid gland and a mapping of the regional distribution of iodine in the gland. The picture produced is similar to that of the conventional radioisotope thyroid scan. In 5 normal subjects and 70 patients with thyroid disease, the thyroid concentration of iodine varied between undetectable and 28 mg. With the exception of hypothyroid patients, who showed low thyroid levels of iodine, all patients showed iodine values overlapping the normal range. The fluorescent scan gave results similar to those of the isotope scan in most cases. Exceptions were noted in some hypothyroid patients, patients with flooded iodine pool, and patients receiving suppressive doses of exogenous thyroid hormone. Small cold nodules were best detected by the radionuclide scintigram. The value of the fluorescent scan is in its low radiation dose and in the possibility it affords of studying patients whose thyroid glands have reduced uptake of the radioactive tracer.
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A wide variation in prevalence rates of tardive dyskinesia and spontaneous orofacial dyskinesia has been reported in the elderly. To clarify these discrepancies, we studied 45 patients over the age of 60 years admitted to a short-term psychiatric unit. Standardized criteria for the diagnosis of dyskinesia were used. We found a rate of tardive dyskinesia of only 21% (7/33) in our patients having a history of neuroleptic exposure. We found no cases (0/12) of spontaneous orofacial dyskinesia. There was a significant association between tardive dyskinesia and psychiatric diagnosis, with the highest rate of tardive dyskinesia in those patients with schizophrenic disorders, followed by those with organic disorders and mood disorders, respectively. There was also a significant association between the presence of tardive dyskinesia and radiographic evidence of cortical atrophy, and a trend towards an association with leukoencephalopathy. Our results suggest that published rates of tardive and spontaneous dyskinesia in the elderly may overestimate the prevalence of these disorders, especially among geriatric patients with acute psychiatric presentations.