Health and Medicine

FSI’s researchers assess health and medicine through the lenses of economics, nutrition and politics. They’re studying and influencing public health policies of local and national governments and the roles that corporations and nongovernmental organizations play in providing health care around the world. Scholars look at how governance affects citizens’ health, how children’s health care access affects the aging process and how to improve children’s health in Guatemala and rural China. They want to know what it will take for people to cook more safely and breathe more easily in developing countries.

FSI professors investigate how lifestyles affect health. What good does gardening do for older Americans? What are the benefits of eating organic food or growing genetically modified rice in China? They study cost-effectiveness by examining programs like those aimed at preventing the spread of tuberculosis in Russian prisons. Policies that impact obesity and undernutrition are examined; as are the public health implications of limiting salt in processed foods and the role of smoking among men who work in Chinese factories. FSI health research looks at sweeping domestic policies like the Affordable Care Act and the role of foreign aid in affecting the price of HIV drugs in Africa.

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New technologies, including prescription drugs and medical devices, are a major driver of increases in U.S. health care expenditures, which have grown by an estimated 71% since 2000.1 The U.S. market for drugs and devices is regulated by the Food and Drug Administration (FDA), which scrutinizes clinical trial data for evidence of safety and efficacy. Although the FDA has been criticized for missteps and inefficiencies in its approval process, these are not the causes of increasing health care expenditures. More relevant is FDA oversight of the labeling and promotion of medical products.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
New England Journal of Medicine
Authors
Randall S. Stafford
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Objective

To evaluate the cost effectiveness of laparoscopy for unexplained infertility.

Design

We performed a cost-effectiveness analysis using a computer-generated decision analysis tree. Data used to construct the mathematical model were extracted from the literature or obtained from our practice. We compared outcomes following four treatment strategies: [1] no treatment, [2] standard infertility treatment algorithm (SITA), [3] laparoscopy with expectant management (LSC/EM), and [4] laparoscopy with infertility therapy (LSC/IT). The incremental cost-effectiveness ratio (ICER) was calculated, and one-way sensitivity analyses assessed the impact of varying base-case estimates.

Setting

Academic in vitro fertilization practice.

Patient(s)

Computer-simulated patients assigned to one of four treatments.

Intervention(s)

Fertility treatment or laparoscopy.

Main Outcome Measure(s)

Incremental cost-effectiveness ratios.

Result(s)

Using base-case assumptions, LSC/EM was preferred (ICER =$128,400 per live-birth in U.S. dollars). Changing the following did not alter results: rates and costs of multiple gestations, penalty for high-order multiples, infertility treatment costs, and endometriosis prevalence. Outcomes were most affected by patient dropout from infertility treatments-SITA was preferred when dropout was less than 9% per cycle. Less important factors included surgical costs, acceptability of twins, and the effects of untreated endometriosis on fecundity.

Conclusion(s)

Laparoscopy is cost effective in the initial management of young women with infertility, particularly when infertility treatment dropout rates exceed 9% per cycle.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
Fertility and Sterility
Authors
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Data and well-constructed measures quantify suboptimal quality in health care and play a crucial role in improving quality. Measures are useful for three major purposes: (1) driving improvements in outcomes of care by prioritizing and selecting appropriate interventions, (2) developing comparative quality reports for consumer and payer decision making and health system accountability, and (3) creating incentives that pay for performance. This article describes the current landscape for measurement in pediatrics compared to adult care, provides a case study of the development and application of a publicly available and federally funded pediatric indicator set using routinely collected hospital discharge data, and addresses challenges and opportunities in selecting and using measures as a function of intended purpose.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
Pediatric Clinics of North America
Authors
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Despite recommendations for voluntary HIV screening, few medical centres have implemented screening programmes. The objective of the study was to determine whether an intervention with computer-based reminders and feedback would increase screening for HIV in a Department of Veterans Affairs (VA) health-care system. The design of the study was a randomized controlled trial at five primary care clinics at the VA Palo Alto Health Care System. All primary care providers were eligible to participate in the study. The study intervention was computer-based reminders to either assess HIV risk behaviours or to offer HIV testing; feedback on adherence to reminders was provided. The main outcome measure was the difference in HIV testing rates between intervention and control group providers. The control group providers tested 1.0% (n = 67) and 1.4% (n = 106) of patients in the preintervention and intervention period, respectively; intervention providers tested 1.8% (n = 98) and 1.9% (n = 114), respectively (P = 0.75).In our random sample of 753 untested patients, 204 (27%) had documented risk behaviours. Providers were more likely to adhere to reminders to test rather than with reminders to perform risk assessment (11% versus 5%, P < 0.01). Sixty-one percent of providers felt that lack of time prevented risk assessment. In conclusion, in primary care clinics in our setting, HIV testing rates were low. Providers were unaware of the high rates of risky behaviour in their patient population and perceived important barriers to testing. Low-intensity clinical reminders and feedback did not increase rates of screening.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
International Journal of STDs and AIDS
Authors
Douglas K. Owens
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BACKGROUND: Previous research has provided evidence that socioeconomic status has an impact on invasive treatments use after acute myocardial infarction. In this paper, we compare the socioeconomic inequality in the use of high-technology diagnosis and treatment after acute myocardial infarction between the US, Quebec and Belgium paying special attention to financial incentives and regulations as explanatory factors.

METHODS: We examined hospital-discharge abstracts for all patients older than 65 who were admitted to hospitals during the 1993-1998 period in the US, Quebec and Belgium with a primary diagnosis of acute myocardial infarction. Patients' income data were imputed from the median incomes of their residential area. For each country, we compared the risk-adjusted probability of undergoing each procedure between socioeconomic categories measured by the patient's area median income.

RESULTS: Our findings indicate that income-related inequality exists in the use of high-technology treatment and diagnosis techniques that is not justified by differences in patients' health characteristics. Those inequalities are largely explained, in the US and Quebec, by inequalities in distances to hospitals with on-site cardiac facilities. However, in both Belgium and the US, inequalities persist among patients admitted to hospitals with on-site cardiac facilities, rejecting the hospital location effect as the single explanation for inequalities. Meanwhile, inequality levels diverge across countries (higher in the US and in Belgium, extremely low in Quebec).

CONCLUSIONS: The findings support the hypothesis that income-related inequality in treatment for AMI exists and is likely to be affected by a country's system of health care.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
BMC Health Services Research
Authors
Olga Saynina
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Objective

To establish guidance on grading strength of evidence for the Evidence-based Practice Center (EPC) program of the U.S. Agency for Healthcare Research and Quality.

Study Design and Setting

Authors reviewed authoritative systems for grading strength of evidence, identified domains and methods that should be considered when grading bodies of evidence in systematic reviews, considered public comments on an earlier draft, and discussed the approach with representatives of the Grading of Recommendations Assessment, Development, and Evaluation (GRADE) working group.

Results

The EPC approach is conceptually similar to the GRADE system of evidence rating; it requires assessment of four domains: risk of bias, consistency, directness, and precision. Additional domains to be used when appropriate include dose-response association, presence of confounders that would diminish an observed effect, strength of association, and publication bias. Strength of evidence receives a single grade: high, moderate, low, or insufficient. We give definitions, examples, mechanisms for scoring domains, and an approach for assigning strength of evidence.

Conclusion

EPCs should grade strength of evidence separately for each major outcome and, for comparative effectiveness reviews, all major comparisons. We will collaborate with the GRADE group to address ongoing challenges in assessing the strength of evidence.

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Publication Type
Books
Publication Date
Journal Publisher
Journal of Clinical Epidemiology
Authors
Douglas K. Owens
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Objective. To compare safety climate between diverse U.S. hospitals and Veterans Health Administration (VA) hospitals, and to explore the factors influencing climate in each setting.

Data Sources. Primary data from surveys of hospital personnel; secondary data from the American Hospital Association's 2004 Annual Survey of Hospitals.

Study Design. Cross-sectional study of 69 U.S. and 30 VA hospitals.

Data Collection. For each sample, hierarchical linear models used safety-climate scores as the dependent variable and respondent and facility characteristics as independent variables. Regression-based Oaxaca–Blinder decomposition examined differences in effects of model characteristics on safety climate between the U.S. and VA samples.

Principal Findings. The range in safety climate among U.S. and VA hospitals overlapped substantially. Characteristics of individuals influenced safety climate consistently across settings. Working in southern and urban facilities corresponded with worse safety climate among VA employees and better safety climate in the U.S. sample. Decomposition results predicted 1.4 percentage points better safety climate in U.S. than in VA hospitals: −0.77 attributable to sample-characteristic differences and 2.2 due to differential effects of sample characteristics.

Conclusions. Results suggest that safety climate is linked more to efforts of individual hospitals than to participation in a nationally integrated system or measured characteristics of workers and facilities.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
Health Services Research
Authors
Sara J. Singer
David M. Gaba
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Estimating the potential health benefits and expenditures of a partially effective HIV vaccine is an important consideration in the debate about whether HIV vaccine research should continue. We developed an epidemic model to estimate HIV prevalence, new infections, and the cost-effectiveness of vaccination strategies in the U.S. Vaccines with modest efficacy could prevent 300,000-700,000 HIV infections and save $30 billion in healthcare expenditures over 20 years. Targeted vaccination of high-risk individuals is economically efficient, but difficulty in reaching these groups may mitigate these benefits. Universal vaccination is cost-effective for vaccines with 50% efficacy and price similar to other infectious disease vaccines.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
Vaccine
Authors
Margaret L. Brandeau
Douglas K. Owens
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Objective

To determine whether eligible extremely-low-birth-weight children (<1000g) were enrolled in the federally enacted, state-coordinated Early Intervention (EI) program intended to help children with developmental delay or disability regardless of parental income, and the factors associated with enrollment.

Methods

Retrospective analysis of 884 EI-eligible ELBW children born in South Carolina with birth weight 401 to 999g, gestation ≥24 weeks, and survival for the first 120 days of life. We created a linked data set with data from Early Intervention (1996–2001), Vital Records (1996–1998), death certificates, and Medicaid. Each child was followed from birth to 3 years old, the program eligibility period.

Results

A total of 54% of ELBW children were enrolled in EI at any time from birth to 36 months. Even among children ever enrolled in Medicaid (83% of all ELBW children), only 63% were enrolled in EI. Being born in a multiple gestational birth, having heavier birth weight (750 to 999g), and having ever enrolled in Medicaid were positively associated with EI enrollment. Among Medicaid patients for whom perinatal data were available, additional risk adjustment showed that EI enrollment was more likely with birth in level 3 hospitals, birth weight 750 to 999g, Neonatal Medical Index severity level V (most severe), and longer initial length of hospital stay.

Conclusions

Only about half of eligible ELBW children in South Carolina were enrolled—much lower than reported elsewhere. Efforts are needed to understand why eligible infants are not being enrolled and to develop strategies to remedy the situation.

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Publication Type
Journal Articles
Publication Date
Journal Publisher
Academic Pediatrics
Authors
C. Jason Wang
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Purpose. Mathematical and simulation models are increasingly used to plan for and evaluate health sector responses to disasters, yet no clear consensus exists regarding best practices for the design, conduct, and reporting of such models. The authors examined a large selection of published health sector disaster response models to generate a set of best practice guidelines for such models.

Methods. The authors reviewed a spectrum of published disaster response models addressing public health or health care delivery, focusing in particular on the type of disaster and response decisions considered, decision makers targeted, choice of outcomes evaluated, modeling methodology, and reporting format. They developed initial recommendations for best practices for creating and reporting such models and refined these guidelines after soliciting feedback from response modeling experts and from members of the Society for Medical Decision Making.

Results. The authors propose 6 recommendations for model construction and reporting, inspired by the most exemplary models: health sector disaster response models should address real-world problems, be designed for maximum usability by response planners, strike the appropriate balance between simplicity and complexity, include appropriate outcomes that extend beyond those considered in traditional cost-effectiveness analyses, and be designed to evaluate the many uncertainties inherent in disaster response. Finally, good model reporting is particularly critical for disaster response models.

Conclusions. Quantitative models are critical tools for planning effective health sector responses to disasters. The proposed recommendations can increase the applicability and interpretability of future models, thereby improving strategic, tactical, and operational aspects of preparedness planning and response.

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Publication Type
Policy Briefs
Publication Date
Journal Publisher
Medical Decision Making
Authors
Margaret L. Brandeau
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