Evaluating diagnosis-based case-mix measures: how well do they apply to the VA population?

BACKGROUND: Diagnosis-based case-mix measures are increasingly used for provider profiling, resource allocation, and capitation rate setting. Measures developed in one setting may not adequately capture the disease burden in other settings. OBJECTIVES: To examine the feasibility of adapting two such measures, Adjusted Clinical Groups (ACGs) and Diagnostic Cost Groups (DCGs), to the Department of Veterans Affairs (VA) population. RESEARCH DESIGN: A 60% random sample of veterans who used health care services during FY 1997 was obtained from VA inpatient and outpatient administrative databases. A split-sample technique was used to obtain a 40% sample (n = 1,046,803) for development and a 20% sample (n = 524,461) for validation. METHODS: Concurrent ACG and DCG risk adjustment models, using 1997 diagnoses and demographics to predict FY 1997 utilization (ambulatory provider encounters, and service days-the sum of a patient's inpatient and outpatient visit days), were fitted and cross-validated. RESULTS: Patients were classified into groupings that indicated a population with multiple psychiatric and medical diseases. Model R-squares explained between 6% and 32% of the variation in service utilization. Although reparameterized models did better in predicting utilization than models with external weights, none of the models was adequate in characterizing the entire population. For predicting service days, DCGs were superior to ACGs in most categories, whereas ACGs did better at discriminating among veterans who had the lowest utilization. CONCLUSIONS: Although "off-the-shelf" case-mix measures perform moderately well when applied to another setting, modifications may be required to accurately characterize a population's disease burden with respect to the resource needs of all patients.

Mental disorders and mental health treatment among U.S. Department of Veterans Affairs outpatients: the Veterans Health Study.

OBJECTIVE: The authors examined the self-reported presence and treatment of current depressive disorder, posttraumatic stress disorder (PTSD), and alcohol-related disorder in a group of outpatient veterans. METHOD: Data were obtained from the Veterans Health Study, a longitudinal investigation of male veterans' health. A representative sample of 2,160 outpatients (mean age = 62 years) was drawn from Boston-area U.S. Department of Veterans Affairs (VA) outpatient facilities. The participants completed screening measures for depression, PTSD, and alcohol-related disorder. Mental health treatment was assessed by interviews. RESULTS: The screening criteria for at least one current mental disorder were satisfied by 40% (N = 856) of the patients. Screening rates were 31% (N = 676) for depression, 20% (N = 426) for PTSD, and 12% (N = 264) for alcohol-related disorder. Patients who screened positively for current mental disorders were younger, less likely to be married or employed, and more likely to report traumatic exposure than were those without mental disorders. Of those who met the screening criteria for any of the targeted mental disorders, 68% (N = 579) reported receiving mental health treatment. Younger, Caucasian men and those who reported more traumatic exposure were more likely to report receiving mental health treatment than were others who screened positively for mental disorders. CONCLUSIONS: Screening rates of depression and PTSD and rates of mental health treatment were considerably higher among these VA outpatients than among similar patients in primary care in the private sector. Although the VA is currently meeting the mental health care needs of its patients, future fiscal constraints could affect most adversely the treatment of non-Caucasian and older patients and those with a history of traumatic exposure.

Medical profile of women Veterans Administration outpatients who report a history of sexual assault occurring while in the military.

To profile differences in current physical symptoms and medical conditions among women users of Veterans Administration (VA) health services with and without a self-reported history of sexual assault sustained during military service, we conducted a cross-sectional analysis of a nationally representative, random sample of women veterans using VA outpatient services (n = 3632). A self-administered, mailed survey asked whether women had sustained sexual assault while in the military and requested information about a spectrum of physical symptoms and medical conditions. A history of sexual assault while in the military was reported by 23% of women VA users and was associated with current physical symptoms and medical conditions in every domain assessed. For example, women who reported sexual assault were more likely to indicate that they had a "heart attack" within the past year, even after adjusting for age, hypertension, diabetes, and smoking history (OR 2.3, 95% CI 1.3-4.0). Among women reporting a history of sexual assault while in the military, 26% endorsed > or = 12 of 24 symptoms/conditions, compared with 11% of women with no reported sexual assault while in the military (p < 0.001). Clinicians need to be attuned to the high frequency of sexual assault occurring while in the military reported by women VA users and its associated array of current physical symptoms and medical conditions. Clinicians should consider screening both younger and older patients for a sexual violence history, especially patients with multiple physical symptoms.

Prevalence of depressive and alcohol abuse symptoms among women VA outpatients who report experiencing sexual assault while in the military.

Among a national sample of 3,632 women VA outpatients, we determined self-reported prevalence of sexual assault experienced during military service and compared screening prevalence for current symptoms of depression and alcohol abuse between those who did and did not report this history. Data were obtained by mailed questionnaire. Military-related sexual assault was reported by 23%. Screening prevalence for symptoms of current depression was 3 times higher and for current alcohol abuse was 2 times higher among those who reported experiencing military-related sexual assault. Recent mental health treatment was reported by 50% of those who reported experiencing sexual assault during military service and screened positive for symptoms of depression, and by 40% of those who screened positive for symptoms of alcohol abuse.