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Biomedical subjects

Susan L Ettner

Publications and source records attributed to Susan L Ettner.

At least 19 recordsLinked to original sources
PubMed2007

Methods for improving regression analysis for skewed continuous or counted responses.

Standard inference procedures for regression analysis make assumptions that are rarely satisfied in practice. Adjustments must be made to insure the validity of statistical inference. These adjustments, known for many years, are used routinely by some health researchers but not by others. We review some of these methods and give an example of their use in a health services study for a continuous and a count outcome. For the continuous outcome, we describe re-transformation using the smear factor, accounting for missing cases via multiple imputation and attrition weights and improving results with bootstrap methods. For the count outcome, we describe zero inflated Poisson and negative binomial models and the two-part model to account for overabundance of zero values. Recent advances in computing and software development have produced user-friendly computer programs that enable the data analyst to improve prediction and inference based on regression analysis.

Data Interpretation, Statistical↗
PubMed2007

The impact of managed care on access to highly active antiretroviral therapy and on outcomes among Medicaid beneficiaries with AIDS.

Medicaid has promoted managed care plans (MCPs) to control health care costs for HIV-infected enrollees. This article examines the impact of MCP enrollment on use of highly active antiretroviral therapy (HAART), antiretroviral therapy (ARV), hospitalization, and death among Medicaid beneficiaries with AIDS. A retrospective longitudinal cohort study of 7,028 Medicaid beneficiaries with AIDS in California was conducted from 1999 to 2001. The impact of MCP enrollment was estimated using single-equation and bivariate probit models. Baseline HAART use was found to be significantly lower for beneficiaries in MCPs versus fee-for-service (FFS). The effect was attenuated and not significant after correcting for selection bias. MCP enrollment was not associated with overall ARV use, mortality, or hospitalization. MCP enrollment does not substantially affect medication use or clinical outcomes. Before making changes to care delivery, policy makers should address the potential costs and benefits of MCP over FFS Medicaid for chronically ill beneficiaries.

Adult↗
PubMed2006

Performance of statistical models to predict mental health and substance abuse cost.

BACKGROUND: Providers use risk-adjustment systems to help manage healthcare costs. Typically, ordinary least squares (OLS) models on either untransformed or log-transformed cost are used. We examine the predictive ability of several statistical models, demonstrate how model choice depends on the goal for the predictive model, and examine whether building models on samples of the data affects model choice. METHODS: Our sample consisted of 525,620 Veterans Health Administration patients with mental health (MH) or substance abuse (SA) diagnoses who incurred costs during fiscal year 1999. We tested two models on a transformation of cost: a Log Normal model and a Square-root Normal model, and three generalized linear models on untransformed cost, defined by distributional assumption and link function: Normal with identity link (OLS); Gamma with log link; and Gamma with square-root link. Risk-adjusters included age, sex, and 12 MH/SA categories. To determine the best model among the entire dataset, predictive ability was evaluated using root mean square error (RMSE), mean absolute prediction error (MAPE), and predictive ratios of predicted to observed cost (PR) among deciles of predicted cost, by comparing point estimates and 95% bias-corrected bootstrap confidence intervals. To study the effect of analyzing a random sample of the population on model choice, we re-computed these statistics using random samples beginning with 5,000 patients and ending with the entire sample. RESULTS: The Square-root Normal model had the lowest estimates of the RMSE and MAPE, with bootstrap confidence intervals that were always lower than those for the other models. The Gamma with square-root link was best as measured by the PRs. The choice of best model could vary if smaller samples were used and the Gamma with square-root link model had convergence problems with small samples. CONCLUSION: Models with square-root transformation or link fit the data best. This function (whether used as transformation or as a link) seems to help deal with the high comorbidity of this population by introducing a form of interaction. The Gamma distribution helps with the long tail of the distribution. However, the Normal distribution is suitable if the correct transformation of the outcome is used.

Aged↗
PubMed2006

Disparities in the utilization of high-volume hospitals for complex surgery.

CONTEXT: Referral to high-volume hospitals has been recommended for operations with a demonstrated volume-outcome relationship. The characteristics of patients who receive care at low-volume hospitals may be different from those of patients who receive care at high-volume hospitals. These differences may limit their ability to access or receive care at a high-volume hospital. OBJECTIVE: To identify patient characteristics associated with the use of high-volume hospitals, using California's Office of Statewide Health Planning and Development patient discharge database. DESIGN, SETTING, AND PARTICIPANTS: Retrospective study of Californians receiving the following inpatient operations from 2000 through 2004: elective abdominal aortic aneurysm repair, coronary artery bypass grafting, carotid endarterectomy, esophageal cancer resection, hip fracture repair, lung cancer resection, cardiac valve replacement, coronary angioplasty, pancreatic cancer resection, and total knee replacement. MAIN OUTCOME MEASURES: Patient race/ethnicity and insurance status in high-volume (highest 20% of patients by mean annual volume) and in low-volume (lowest 20%) hospitals. RESULTS: A total of 719,608 patients received 1 of the 10 operations. Overall, nonwhites, Medicaid patients, and uninsured patients were less likely to receive care at high-volume hospitals and more likely to receive care at low-volume hospitals when controlling for other patient-level characteristics. Blacks were significantly (P<.05) less likely than whites to receive care at high-volume hospitals for 6 of the 10 operations (relative risk [RR] range, 0.40-0.72), while Asians and Hispanics were significantly less likely to receive care at high-volume hospitals for 5 (RR range, 0.60-0.91) and 9 (RR range, 0.46-0.88), respectively. Medicaid patients were significantly less likely than Medicare patients to receive care at high-volume hospitals for 7 of the operations (RR range, 0.22-0.66), while uninsured patients were less likely to be treated at high-volume hospitals for 9 (RR range, 0.20-0.81). CONCLUSIONS: There are substantial disparities in the characteristics of patients receiving care at high-volume hospitals. The interest in selective referral to high-volume hospitals should include explicit efforts to identify the patient and system factors required to reduce current inequities regarding their use.

Adult↗
PubMed2006

Physicians' perceived knowledge of and responsibility for managing patients' out-of-pocket costs for prescription drugs.

BACKGROUND: Most insurers in the US have implemented incentive-based formularies that rely on out-of-pocket costs to influence prescription drug utilization. Medicare Part D plans have broadly adopted such benefit designs. OBJECTIVE: To evaluate physicians' perceptions of their knowledge of formularies and out-of-pocket costs, factors that influence knowledge of costs, physicians' perceived responsibility for helping patients manage their out-of-pocket costs for prescription drugs, and physicians' perceptions of the role of pharmacists in managing these costs. METHODS: A multiple-choice survey was mailed to a random sample of 1200 physician members of the California Medical Association; a phone survey of nonresponders was then conducted. RESULTS: Of 1027 surveys delivered to correct addresses, 509 (49.6%) responses were received. Thirty-three percent of physicians reported that they were usually or always aware of patients' formularies and 20% were usually or always aware of patients' out-of-pocket costs for medications. Surgeons, emergency department physicians, and physicians that prescribe from more formularies than other physicians are less likely to be aware of patients' out-of-pocket costs, while physicians in large practices and those who use computers to prescribe are more aware. While 91% of physicians agreed that it is important that patients' out-of-pocket costs be managed, 40% somewhat or strongly agreed that it is their responsibility to help. Sixty-five percent of physicians believed that it is the responsibility of the pharmacist to be familiar with patients' out-of-pocket costs. CONCLUSIONS: Physicians often lack the knowledge to assist patients in the management of their out-of-pocket costs for prescription drugs and they depend on pharmacists to help patients manage those costs. Computer order entry and resources available in large physician organizations improve physicians' awareness of out-of-pocket costs when prescribing.

Attitude of Health Personnel↗
PubMed2006

The implications of choice: prescribing generic or preferred pharmaceuticals improves medication adherence for chronic conditions.

BACKGROUND: A large proportion of Americans are enrolled in 3-tier pharmacy benefit plans. We studied whether patients enrolled in such plans who receive generic or preferred brand-name agents when initiating chronic therapy were more adherent to treatment than those who received nonpreferred brand-name medications. METHODS: We analyzed pharmacy claims filled between October 1, 2001, and October 1, 2003, from a large health plan for 6 classes of chronic medications: 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors, calcium channel blockers, oral contraceptives, orally inhaled corticosteroids, angiotensin receptor blockers, and angiotensin-converting enzyme inhibitors. We measured adherence as the proportion of days covered (PDC) in each drug class during the first year of therapy. We evaluated how the formulary status of the initial prescription (generic, preferred, or nonpreferred) influenced PDC and adequate adherence, defined as PDC greater than 80%, over the subsequent year. RESULTS: A total of 7532 new prescriptions were filled in 1 of the classes evaluated: 1747 (23.2%) for nonpreferred medications, 4376 (58.1%) for preferred drugs, and 1409 (18.7%) for generic drugs. After controlling for patient sociodemographic characteristics and drug class, PDC was 12.6% greater for patients initiated on generic medications vs nonpreferred medications (58.8% vs 52.2%; P<.001). The PDC was 8.8% greater for patients initiated on preferred vs nonpreferred medications (56.8% vs 52.2%; P<.001). Patients initiated on generic and preferred medications had 62% and 30% greater odds, respectively, of achieving adequate adherence compared with those who received nonpreferred medications. CONCLUSION: In 3-tier pharmacy benefit plans, prescribing generic or preferred medications within a therapeutic class is associated with improvements in adherence to therapy.

Adrenal Cortex Hormones↗
PubMed2006

The effect of a multidisciplinary hospitalist/physician and advanced practice nurse collaboration on hospital costs.

OBJECTIVE: To compare nurse practitioner/physician management of hospital care, multidisciplinary team-based planning, expedited discharge, and assessment after discharge to usual management. BACKGROUND: In the context of managed care, the goal of academic medical centers is to provide quality care at the lowest cost and minimize length of stay (LOS) while not compromising quality. METHODS: Comparative, 2-group, quasiexperimental design was used; 1,207 general medicine patients (n=581 in the experimental group and n=626 in the control group) were enrolled. The control unit provided usual care. The care management in the experimental unit had 3 different components: an advanced practice nurse who followed the patients during hospitalization and 30 days after discharge, a hospitalist medical director and another hospitalist, and daily multidisciplinary rounds. LOS, hospital costs, mortality, and readmission 4 months after discharge were measured. RESULTS: Average LOS was significantly lower for patients in the experimental group than the control group (5 vs. 6 days, P<.0001). The "backfill profit" to the hospital was US$1591 per patient in the experimental group (SE, US$639). There were no significant group differences in mortality or readmissions. CONCLUSIONS: Collaborative physician/nurse practitioner multidisciplinary care management of hospitalized medical patients reduced LOS and improved hospital profit without altering readmissions or mortality.

Academic Medical Centers↗
PubMed2006

Impact of changes in Medicare Home Health care reimbursement on month-to-month Home Health utilization between 1996 and 2001 for a national sample of patients undergoing orthopedic procedures.

BACKGROUND: Beginning October 1, 1997, Medicare implemented a series of major changes to the Home Health (HH) reimbursement system. Reimbursements were first significantly reduced under the Interim Payment System (IPS) and then relaxed slightly until implementation of the HH Prospective Payment System (PPS) on October 1, 2000. OBJECTIVE: The objective of this study was to examine the impact of reimbursement policy on HH care utilization. RESEARCH DESIGN: We postulated that in response to the initial changes, there would be reductions in both the probability of any HH use and the number of HH visits per HH user. Under PPS, we postulated there would be further reduction in number of HH visits. We tested whether the policy response differed by HH agency structure and whether subgroups of patients were differentially affected. An interrupted time-series analysis was conducted to examine month-to-month probability of HH selection and the number of HH visits among users. SUBJECTS: A 100% sample of all Medicare recipients undergoing either elective joint replacement (1.6 million hospital discharges) or surgical management of hip fracture (1.2 million hospital discharges) between January 1996 and December 2001 was selected. RESULTS: Under the IPS, the probability of any HH use and number of visits per episode of HH care fell until the IPS was refined in October 1998. With implementation of the PPS, HH visits fell commensurately. Differentially larger reductions in care were noted at for-profit HH agencies, for the elderly, women, patients receiving state assistance, and patients first discharged to skilled nursing facility or rehabilitation hospitals. CONCLUSIONS: Changes in month-to-month utilization of HH services were sharp and well correlated with policy implementation dates, strengthening the evidence for a causal association between policy and patient care in the midst of a sea of concurrent policy changes. Greater reductions in HH visits were noted for vulnerable groups.

Aged↗
PubMed2006

Benefit-cost in the California treatment outcome project: does substance abuse treatment "pay for itself"?

OBJECTIVE: To examine costs and monetary benefits associated with substance abuse treatment. DATA SOURCES: Primary and administrative data on client outcomes and agency costs from 43 substance abuse treatment providers in 13 counties in California during 2000-2001. STUDY DESIGN: Using a social planner perspective, the estimated direct cost of treatment was compared with the associated monetary benefits, including the client's costs of medical care, mental health services, criminal activity, earnings, and (from the government's perspective) transfer program payments. The cost of the client's substance abuse treatment episode was estimated by multiplying the number of days that the client spent in each treatment modality by the estimated average per diem cost of that modality. Monetary benefits associated with treatment were estimated using a pre-posttreatment admission study design, i.e., each client served as his or her own control. DATA COLLECTION: Treatment cost data were collected from providers using the Drug Abuse Treatment Cost Analysis Program instrument. For the main sample of 2,567 clients, information on medical hospitalizations, emergency room visits, earnings, and transfer payments was obtained from baseline and 9-month follow-up interviews, and linked to information on inpatient and outpatient mental health services use and criminal activity from administrative databases. Sensitivity analyses examined administrative data outcomes for a larger cohort (N=6,545) and longer time period (1 year). PRINCIPAL FINDINGS: On average, substance abuse treatment costs $1,583 and is associated with a monetary benefit to society of $11,487, representing a greater than 7:1 ratio of benefits to costs. These benefits were primarily because of reduced costs of crime and increased employment earnings. CONCLUSIONS: Even without considering the direct value to clients of improved health and quality of life, allocating taxpayer dollars to substance abuse treatment may be a wise investment.

California↗
PubMed2006

Are physician reimbursement strategies associated with processes of care and patient satisfaction for patients with diabetes in managed care?

OBJECTIVE: To examine associations between physician reimbursement incentives and diabetes care processes and explore potential confounding with physician organizational model. DATA SOURCES: Primary data collected during 2000-2001 in 10 managed care plans. STUDY DESIGN: Multilevel logistic regressions were used to estimate associations between reimbursement incentives and process measures, including the receipt of dilated eye exams, foot exams, influenza immunizations, advice to take aspirin, and assessments of glycemic control, proteinuria, and lipid profile. Reimbursement measures included the proportions of compensation received from salary, capitation, fee-for-service (FFS), and performance-based payment; the performance-based payment criteria used; and interactions of these criteria with the strength of the performance-based payment incentive. DATA COLLECTION: Patient, provider group, and health plan surveys and medical record reviews were conducted for 6,194 patients with diabetes. PRINCIPAL FINDINGS: Without controlling for physician organizational model, care processes were better when physician compensation was based primarily on direct salary rather than FFS reimbursement (four of seven processes were better, with relative risks ranging from 1.13 to 1.23) or capitation (six were better, with relative risks from 1.06 to 1.36); and when quality/satisfaction scores influenced physician compensation (three were better, with relative risks from 1.17 to 1.26). However, these associations were substantially confounded by organizational model. CONCLUSIONS: Physician reimbursement strategies are associated with diabetes care processes, although their independent contributions are difficult to assess, due to high correlation with physician organizational model. Regardless of causality, a group's use of quality/satisfaction scores to determine physician compensation may indicate delivery of high-quality diabetes care.

Diabetes Mellitus↗
PubMed2006

The effect of pharmacy benefit design on patient-physician communication about costs.

BACKGROUND: Incentive-based formularies have been widely instituted to control the rising costs of prescription drugs. To work properly, such formularies depend on patients to be aware of financial incentives and communicate their cost preferences with prescribing physicians. The impact of financial incentives on patient awareness of and communication about those costs is unknown. OBJECTIVE: To evaluate the relationship between enrollment in incentive-based pharmacy benefit plans and awareness of out-of-pocket costs and rates of communication about out-of-pocket costs. DESIGN: A matched telephone survey of patients and their primary care physicians. SETTING: Los Angeles County. PARTICIPANTS: One thousand nine hundred and seventeen patients aged 53 to 82 (73% response rate). MEASUREMENTS: Patient-reported pharmacy benefit design, knowledge of out-of-pocket costs, and discussion of out-of-pocket costs with physicians. RESULTS: Sixty-two percent of patients who had prescription drug coverage and were aware of their pharmacy benefit design reported being enrolled in incentive-based plans. The majority of these (54%) were "never" or only "sometimes" aware of their out-of-pocket cost requirements at the time of the physician visit. After controlling for numerous physician and patient level variables, we found that patients enrolled in pharmacy benefit designs requiring no copayments were more likely to report they "never" discuss out-of-pocket costs with physicians compared with patients enrolled in incentive-based pharmacy benefit designs (81% vs 67%, P=.001) and patients with no prescription drug insurance (57%, P<.001). CONCLUSIONS: Incentive-based pharmacy benefit plans and lack of insurance are associated with increased rates of discussions about out-of-pocket costs. Nonetheless, most incentive-based enrollees are unaware of out-of-pocket costs when prescriptions are written and never discuss out-of-pocket costs with their physicians, likely mitigating the effectiveness of financial incentives to guide decision making. Considering that out-of-pocket costs are associated with adherence to medical therapy, interventions to improve patient access to out-of-pocket cost information and the frequency of patient-physician discussions about costs are needed.

Aged↗
PubMed2006

Health-related quality of life and patient reports about care outcomes in a multidisciplinary hospital intervention.

BACKGROUND: Patient perceptions of care and health-related quality of life (HRQOL) are important outcomes for hospitalized patients. PURPOSE: This study examined patient experiences with hospital care and HRQOL in individuals hospitalized at a west coast teaching hospital. METHODS: We assessed patient experiences with care and HRQOL using interviews with 1,207 hospitalized, general medicine patients participating in a multidisciplinary provider team intervention at a large academic medical center. Patient outcome variables included the Picker dimensions of hospital care (Continuity and Transition, Coordination of Care, Emotional Support, Information and Education, Involvement of Family and Friends, Physical Comfort, Respect for Patient Preferences, Overall Impression), the Health Utilities Index Mark 3 (HUI-3), and the SF-12 physical (PCS-12) and mental health (MCS-12) summary scores. RESULTS: Patients randomized to a multidisciplinary intervention reported higher emotional support (b = 3.32), t(903) = 2.01, p =.044, and physical comfort (b = 3.49), t(863) = 2.25, p = .025, from health care providers than did the control group, but these effects became nonsignificant after adjusting for multiple comparisons. The HUI-3, PCS-12, and MCS-12 summary scores improved significantly from baseline to the 30-day, ts(943, 919, 860) = 4.94, 2.20, and 5.31, ps < .0001, = .03, and < .0001, respectively, and the 4-month follow-ups, ts(871, 919, 943) = 7.25, 8.68, and 8.08, ps < .001, < .001, and < .0001, respectively, but change on these measures did not differ between intervention and control patients. Baseline health was significantly associated with patient evaluations of hospital care, but patient evaluations did not predict future health. CONCLUSIONS: There were no differences in reports and ratings of hospital care or HRQOL between the control and the intervention groups. Hence, the behavioral changes in hospital staff in the intervention group had no effect on patient-reported outcomes. Mental health at baseline was predictive of patient evaluations of the hospitalization, but evaluations of care were not associated with subsequent HRQOL. Thus, it may be important to adjust patient evaluations of hospital care for case-mix differences in health.

Adolescent↗
PubMed2006

Longitudinal study of new and prevalent use of self-monitoring of blood glucose.

OBJECTIVE: We sought to assess longitudinal association between self-monitoring of blood glucose (SMBG) and glycemic control in diabetic patients from an integrated health plan (Kaiser Permanente Northern California). RESEARCH DESIGN AND METHODS: Longitudinal analyses of glycemic control among 1) 16,091 patients initiating SMBG (new-user cohort) and 2) 15,347 ongoing users of SMBG (prevalent-user cohort). SMBG frequency was based on pharmacy use (number of blood glucose test strips dispensed), and glycemic control was based on HbA(1c) (A1C). In the new-user cohort, ANCOVA models (pre- and posttest design) were used to assess the effect of initiating SMBG. In the prevalent-user cohort, repeated-measure, mixed-effects models with random-intercept and time-dependent covariates were used to assess changes in SMBG and A1C. All models were stratified by therapy (no medications, oral agents only, or insulin) and adjusted for baseline A1C, sociodemographics, insulin injection frequency, comorbidity index, medication adherence, smoking status, health care use, and provider specialty. RESULTS: Greater SMBG practice frequency among new users was associated with a graded decrease in A1C (relative to nonusers) regardless of diabetes therapy (P < 0.0001). Changes in SMBG frequency among prevalent users were associated with an inverse graded change in A1C only among pharmacologically treated patients (P < 0.0001). CONCLUSIONS: These observational findings are consistent with short-term benefits of initiating SMBG practice for all patients but continuing benefits only for pharmacologically treated patients. Differences in effectiveness between new versus prevalent users of SMBG have implications for guideline development and interpretation of observational outcomes data.

Aged↗
PubMed2006

Physicians' perceptions of relevant prescription drug costs: do costs to the individual patient or to the population matter most?

OBJECTIVES: Physicians may be aware of at least 2 types of costs when prescribing: patient's out-of-pocket costs and the actual costs of the medication. We evaluated physicians' perceptions about relevant costs for prescription drugs and the importance of communication about these costs. STUDY DESIGN: Mailed survey to a random sample of 1200 physician members of the California Medical Association, and a phone survey of a sample of nonresponders. METHODS: Descriptive statistics of survey items, McNemar's test to compare survey item responses, and logistic regression to evaluate the relationship between physician, practice, and system variables and physicians' perceptions of relevant medication costs. RESULTS: Of respondents with correct addresses, 49.6% responded to the survey; 13% of nonresponders were contacted by phone. Approximately 91% and 80% of physicians reported that it is important to manage patients' out-of-pocket costs and total medication costs, respectively. When comparing the relative importance of managing the 2 types of costs, 59% of physicians agreed that managing patients' out-of-pocket costs was more important than managing the total medication costs and only 16% disagreed. Physicians believed it was more important to discuss out-of-pocket costs than total costs with patients (P < .0001), but only 15% of physicians reported discussing out-of-pocket costs frequently and 5% reported talking about total medication costs frequently. Physicians who managed more Medicare patients had a greater likelihood than physicians managing fewer Medicare patients of prioritizing out-of-pocket cost rather than total cost management (P = .038), and generalists had a greater likelihood than medical subspecialists (P = .046). CONCLUSIONS: Physicians prioritize managing out-of-pocket costs over total medication costs. Pharmacy benefit designs that use patient out-of-pocket cost incentives to influence utilization are addressing the costs to which physicians may be most responsive. When physicians face conflicts between managing patients' out-of-pocket costs and total costs, they will likely try to protect the patients' resources at the expense of the insurer or society. Efforts to align patients', insurers', and societies' incentives will simplify prescribing decisions and result in better value in prescribing.

Adult↗
PubMed2006

Income and employment of people living with combined HIV/AIDS, chronic mental illness, and substance abuse disorders.

BACKGROUND: This paper examines the labor market outcomes of HIV triply-diagnosed adults having a combination of HIV, mental illness and substance abuse problems. AIMS OF THE STUDY: We sought to determine the sources of money income for HIV triply diagnosed adults (public or private), receipt of transfer income (e.g., welfare) and financial support from others. We further sought to ascertain their employment status and analyze the characteristics associated with full- and part-time employment. METHODS: We use self-reported money income during the past 30 days and self-reported employment status. We calculate earnings losses due to illness by subtracting self-reported earnings from average earnings for all U.S. workers based on 5-year age and gender categories. We provide descriptive statistics to show how income and employment vary by patient characteristics and logistic regression analysis to examine correlates of income and employment. RESULTS: Average income is below the poverty level for single individuals, with more than two-thirds coming from public income sources. The likelihood of receiving disability/retirement income was lower among those with the worst mental health (RR=0.80; 95% CI=0.64, 0.97). Blacks were more likely than others to rely on public assistance (RR=1.24; 95% CI=1.02, 1.55) and married individuals were less likely (RR=0.60; 95% CI=0.41, 0.79). While most private income comes from employment, less than 15 percent of this population is employed full- or part-time. On a monthly basis, the average individual in our sample lost $2,726 in income when compared to the earnings of individuals of the same age and sex in the general population. The relative probability of current full-time/part-time employment was lower among females (RR=0.56; 95% CI=0.34, 0.83); such employment also was lower among those in the worst physical health (RR=0.39; 95% CI=0.26, 0.65) and those in moderate physical health (RR=0.55; 95% CI=0.34, 0.81) relative to those in the best physical health. IMPLICATIONS FOR HEALTH CARE PROVISION AND USE: This population represents an important opportunity for better health and labor market outcomes through prevention and improved treatment adherence. IMPLICATIONS FOR HEALTH POLICIES: Despite its relatively small size (at least 100,000), this population merits closer attention due to a combination of their high medical and companion social costs (e.g., income transfers) and the large potential for improving their ability to earn income. IMPLICATIONS FOR FURTHER RESEARCH: Future research should determine the marginal contribution of mental health conditions or substance abuse on income or labor market outcomes relative to individuals having only HIV/AIDS. This would allow policymakers to better understand how much of income and employment can be attributed to HIV/AIDS, mental health or substance abuse. Future work also should examine the impact of integrated treatment services on income and employment for this population.

Acquired Immunodeficiency Syndrome↗
PubMed2005

Effect of physician reimbursement methodology on the rate and cost of cataract surgery.

OBJECTIVES: To compare the effects of 2 reimbursement methodologies, fee-for-service and contact capitation, on cataract extraction rates and costs in a stable physician population with little potential for the influence of patient selection. Previous research evaluating the relationship between physician reimbursement incentives and cataract surgical rates has been limited by physician and patient selection bias. METHODS: A pre-post analysis of claims and encounter data for an average of 91,473 commercial beneficiaries and 14,084 Medicare beneficiaries receiving eye care from a network of ophthalmologists and optometrists in St Louis, Mo, between 1997 and 1998. The rate of cataract extractions per 1000 beneficiaries, the costs of cataract procedures, the rates of noncataract procedures, and the level of professional reimbursement for providers were compared during the final 6 months of fee-for-service physician reimbursement and the first 6 months of contact capitation. RESULTS: Both commercial and Medicare beneficiaries were approximately one half as likely to have cataract extraction (P<.001) under contact capitation as compared with fee-for-service. Professional reimbursement increased by 8% whereas facility fees for cataract procedures decreased by approximately 45%. Cataract surgical rates were disproportionately affected when compared with other ophthalmologic procedures. During the study period, cataract surgical rates were stable in the national and Missouri traditional fee-for-service Medicare population. CONCLUSIONS: The stability of the physician and patient populations allowed us to isolate the effects of physician reimbursement methodology on practice patterns. Compared with fee-for-service, contact capitation reimbursement was associated with significant decreases in cataract extraction rates and costs. The frequency of the cataract extraction surgery, the most common major elective procedure in ophthalmology, was more responsive to physician financial incentives than other ophthalmologic procedures were.

Capitation Fee↗
PubMed2005

Differences in cause-specific mortality between Latino and white adults.

BACKGROUND: Understanding differences in cause-specific mortality between Latinos and whites is important for targeting future public health interventions and research aimed at eliminating health disparities. OBJECTIVES: We sought to determine the contribution of specific causes of death to Latino-white differences in mortality. RESEARCH DESIGN: Using nationally representative data, we estimated cause-specific mortality risks, which were then used in a simulation model to estimate mortality events for a cohort of persons starting at age 25 and followed until death or age 75. SUBJECTS: Subjects were 507,820 Latino and white adults, age 25 or older, who participated in the 1986-1994 National Health Interview Surveys. MEASURES: Outcomes were years of potential life lost before age 75 from specific causes of death and age-specific mortality rate ratios for Latinos compared with whites. RESULTS: Latinos had higher mortality rates than whites before age 45 and similar mortality rates at older ages. Latino women lost 315 (95% confidence interval [CI], 229-2423) more years of potential life (per 1000 persons before the age of 75) than white women and Latino men lost 595 (95% CI, 513-1675) more years than white men. For both men and women, whites lost substantially more years of potential life than Latinos from lung cancer. Homicide, diabetes, HIV, and liver disease contributed most to the excess years of potential life lost among Latino men, and diabetes and HIV contributed most to the excess years of potential life lost among Latino women. CONCLUSIONS: To eliminate health disparities between Latinos and whites, future health policy and public health efforts should target diabetes, homicide, HIV, and liver disease among Latinos and lung cancer among whites.

Acquired Immunodeficiency Syndrome↗