Cost-effectiveness index (CEI): a tool to help evaluate mental health programs.

A method for evaluating the cost-effectiveness of mental health programs is presented. The method takes into account the profile of mental health services a patient receives, the frequency of each service and the relative costs of each service in relation to the change in a patient's clinical condition between entrance into and release from a treatment program. It can also be used to assess change over a specified time period. An example compares the cost-effectiveness index (CEI) for similar cohorts of schizophrenia patients treated in two 24-hour acute care psychiatric systems. The CEI can use either actual dollar costs, if known, or a relative value scale associated with different services. Its utility and weaknesses are discussed. The CEI is designed to alert management to differences in the relative cost-effectiveness of programs serving populations of similar patients. Identification of such differences can contribute to improvement in program functioning.