The evaluation of mental health care systems.

While the demand for deinstitutionalization, strongly supported by the economic aspect of the issue, has resulted in a steep decline in the number of psychiatric beds in many Western countries, the evaluation of extramural psychiatric care has several difficulties, including that of proving effectiveness without experimental control of confounding influences. For a cohort of schizophrenic patients we investigated the impact of out-patient psychiatric treatment on length of stay in hospital and length of stay in the community. Out-patient care had a significant influence on readmission, but no effect on the length of in-patient treatment. While the average cost of community care was less than half that of traditional hospital care, in 6% of the patients this threshold value of continued in-patient care was exceeded. There also seems to be a non-monetary threshold, above which community care is no longer appropriate.