Utilization and patterns of care in comprehensive psychiatric care organizations. A review of studies and some methodological considerations.

• This article reviews and analyzes studies on the utilization of care and patterns of care in psychiatric care organizations with a defined catchment area responsibility. Eight studies fulfilled the inclusion criteria. The main results of the studies were reviewed with regard to distribution of utilization, typical patterns of care, sociodemographic characteristics, clinical characteristics and, when appropriate, organizational characteristics related to utilization. The results show that a small proportion of patients use a large proportion of resources. Sociodemographic factors such as living alone or having no occupation in some of the studies predicted a higher utilization. Only one study reported sex differences, men being more common among heavy users. In most of the studies a psychosis diagnosis predicted a higher utilization. A history of prior contacts with psychiatric care predicted a higher utilization in 2 studies. It is concluded that future studies should make efforts to develop standardized models of classification of patterns of care to enhance possibilities of comparisons. Cost, as a common unit for summarizing and comparing resource utilization, has not been used, but is viewed as a highly relevant measure. Furthermore, measures of utilization should be separated from evaluations of outcome or quality of care. However, the latter is a neglected area that should also be promoted in studies of utilization of psychiatric care to create knowledge of the relationship of utilization to outcome.

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