Limiting inpatient substance use treatment: what are the consequences?

This study tested whether a managed care policy of substituting outpatient for inpatient treatment of substance use disorders shifted treatment costs to psychiatric providers. This was an observational study, based on administrative data of 25,450 adult disabled Medicaid beneficiaries treated for schizophrenia and major affective disorders. Eighteen percent had a diagnosis of substance use disorder. Multivariate regression was used to determine the odds of having a hospital admission and the relationship of managed care to hospital length of stay and total per person treatment expenditures. Hospital admissions and length of stay for both substance use disorder and psychiatric treatment were reduced, but adults with a dual diagnosis had higher annual expenditures compared to those with only a psychiatric diagnosis. There was no evidence of cost shifting. Although emphasis on outpatient treatment did not result in cost shifting, the combination of substance use disorder and psychiatric illness remains an expensive public health problem.

Medical morbidity, mental illness, and substance use disorders.

OBJECTIVE: Previous research on the prevalence of medical disorders among adults with mental illness has been inconclusive. In general, studies have found higher rates among persons with mental illness, but these studies did not account for comorbid substance use disorders. The authors examined whether certain medical disorders are more prevalent among adults with severe mental illness and whether a comorbid substance use disorder increases prevalence beyond the effect of severe mental illness alone. METHODS: Administrative data from the Massachusetts Division of Medical Assistance were used in a cross-sectional observational study design. The sample consisted of 26,332 Medicaid beneficiaries 18 to 64 years of age. Of these, 11,185 had been treated for severe mental illness. Twelve-month prevalence rates were computed, and logistic regression was used to estimate the effect of a substance use disorder or another mental illness on the risk of having a medical disorder. RESULTS: Compared with Medicaid beneficiaries who were not treated for severe mental illness, those with severe mental illness had a significantly higher age- and gender-adjusted risk of the medical disorders considered in the study. Those with a comorbid substance use disorder had the highest risk for five of the disorders. CONCLUSIONS: The higher treated prevalence of certain medical disorders among adults with severe mental illness has three implications: substance use disorder is an important risk factor and requires early detection; integration of the treatment of medical disorders and severe mental illness should receive higher priority; and efforts should be made to develop specialized disease self-management techniques.

Use of a state inpatient forensic system under managed mental health care.

OBJECTIVES: One of the goals of managed mental health care has been to lower the use of inpatient psychiatric treatment. In the past, interventions that have limited hospitalization for persons with severe mental illness have led to greater involvement of these individuals with the criminal justice and forensic mental health systems. The authors examined associations between Medicaid managed mental health care in Massachusetts and rates of admission to the inpatient forensic mental health service maintained by the state's mental health department. METHODS: A total of 7,996 persons who were receiving services from the department before and after the introduction of managed care were studied. A logistic regression model based on generalized estimating equations was used to identify associations between Medicaid beneficiary status and forensic hospitalization before and after the introduction of managed care. RESULTS: The overall rate of forensic hospitalization declined in the study cohort in both periods. However, no significant decline was observed in the risk of forensic hospitalization among Medicaid beneficiaries whose care had become managed. CONCLUSIONS: Although the results of this study warrant further exploration, the risk of forensic hospitalization among Medicaid beneficiaries should be considered by policy makers in the design of mental health system interventions.

Schizophrenia, substance use disorders and medical co-morbidity.

OBJECTIVES: This study compared medical treatment costs of adults with schizophrenia to adults with both substance use disorders and schizophrenia. METHODS: This cross-sectional observational study used a paid claims data base to identify 6884 adults treated for schizophrenia. Twenty percent of these also had substance use disorder. We report the costs and likelihood of hospitalization for eight common medical diseases, and the categories of injuries and poisoning, and ill defined conditions. Multivariate analyses were used to adjust rates of treatment for age and sex differences in the comparison groups. RESULTS: There were higher rates of treatment for five of the eight medical disorders, higher treatment costs for two of the medical disorders and much higher costs for psychiatric treatment among those with comorbid substance use disorders. Both groups had high rates of treatment in the categories of injury and poisoning and ill defined conditions. CONCLUSIONS: Closer working relationships among mental health and medical professionals are needed to care for those with schizophrenia and substance use disorders: first, greater attention to the treatment of substance use disorders may improve the health status of those with schizophrenia, reduce their costly medical and psychiatric care and stabilize their psychiatric condition, and second, continuity of care among professionals may promote willingness to seek medical attention or alleviate misunderstandings when adults with schizophrenia present with medical problems.

Externally caused deaths for adults with substance use and mental disorders.

For decades, there have been reports of shorter life expectancy among those with mental illness, especially those with more serious psychiatric disorders. The purpose of this study was to compare the risk of mortality among Medicaid beneficiaries, aged 18-64 years, treated for mental illness to a comparable group who were not mentally ill and to the general population. The data used were from the Massachusetts Division of Medical Assistance and records of deaths from the Department of Public Health in Massachusetts. Individuals treated for both psychiatric illness and substance use disorders (dual diagnoses) were compared separately from those whose treatment was only for a psychiatric disorder. For all Medicaid beneficiaries, the most common causes of death were attributed to heart disease and cancer. When compared to the general population, adjusted odds ratios estimated death by injury to be twice as likely among the mentally ill when compared to the general population. Medicaid beneficiaries with dual diagnoses are 6-8 times more likely to die of injury, primarily poisoning, than their counterparts treated for medical conditions only.