Health Outcomes

Encina Commons, Room 102,
615 Crothers Way,
Stanford, CA 94305-6019

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Professor, Medicine
Professor, Health Policy
Senior Fellow, by courtesy, Freeman Spogli Institute for International Studies
Senior Fellow, Woods Institute for the Environment
eran_bendavid MD, MS

My academic focus is on global health, health policy, infectious diseases, environmental changes, and population health. Our research primarily addresses how health policies and environmental changes affect health outcomes worldwide, with a special emphasis on population living in impoverished conditions.

Our recent publications in journals like Nature, Lancet, and JAMA Pediatrics include studies on the impact of tropical cyclones on population health and the dynamics of SARS-CoV-2 infectivity in children. These works are part of my broader effort to understand the health consequences of environmental and policy changes.

Collaborating with trainees and leading academics in global health, our group's research interests also involve analyzing the relationship between health aid policies and their effects on child health and family planning in sub-Saharan Africa. My research typically aims to inform policy decisions and deepen the understanding of complex health dynamics.

Current projects focus on the health and social effects of pollution and natural hazards, as well as the extended implications of war on health, particularly among children and women.

Specific projects we have ongoing include:

  • What do global warming and demographic shifts imply for the population exposure to extreme heat and extreme cold events?

  • What are the implications of tropical cyclones (hurricanes) on delivery of basic health services such as vaccinations in low-income contexts?

  • What effect do malaria control programs have on child mortality?

  • What is the evidence that foreign aid for health is good diplomacy?

  • How can we compare health inequalities across countries? Is health in the U.S. uniquely unequal? 

     

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This study was the first to synthesize quantitatively the literature on the effectiveness of pedometers to change physical activity and health outcomes among the elderly.  Preliminary results were presented at the Stanford Prevention Research Center (March 2007) and at the Northern California regional Society for General Internal Medicine (SGIM) Meeting (March 2007), where it won the award for best presentation.  The project was also presented at the International SGIM Meeting in Toronto in April 2007 and received a great deal of media attention.  The results of this study we

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Background: Anticoagulation (AC) with warfarin reduces the risk of thromboembolism (TE) in a variety of applications, yet despite compelling evidence of the value and importance of high quality AC, warfarin remains underused, and dosing is often suboptimal. Approaches to improve AC quality include (1) an AC service (ACS), which allows the physician to delegate day-to-day details of AC management to another provider dedicated to AC care, and (2) incorporating into the treatment plan patient self-testing (PST) under which, after completing a training program, patients perform their own blood testing (typically, using a finger-stick blood analyzer), have dosage adjustments guided by a standard protocol, and forward test results, dosing and other information to the provider. Studies have suggested that PST can improve the quality of AC and perhaps lower TE and bleed rates.The purpose of Department of Veterans Affairs (VA) Cooperative Studies Program (CSP) #481, "The Home INR Study" (THINRS) is to compare AC management with frequent PST using a home monitoring device to high quality AC management (HQACM) implemented by an ACS with conventional monitoring of prothrombin time by international normalized ratio (INR) on major health outcomes. PST in THINRS involves use of an INR monitoring device that is FDA approved for home use.

Study Design: Sites are VA Medical Centers where the ACS has an active roster of more than 400 patients. THINRS includes patients with atrial fibrillation (AF) and/or mechanical heart valve (MHV) expected to be anticoagulated indefinitely. THINRS has two parts. In Part 1, candidates for PST are evaluated for 2 to 4 weeks for their ability to use home monitoring devices. In Part 2, individuals capable of performing PST are randomized to (1) HQACM with testing every 4 weeks and as indicated for out of range values, medication/clinical changes, or (2) PST with testing every week and as indicated for out of range values, medication/clinical changes.The primary outcome measure is event rates, defined as the percent of patients who have a stroke, major bleed, or die. Secondary outcomes include total time in range (TTR), other events (myocardial infarction (MI), non-stroke TE, minor bleeds), competence and compliance with PST, satisfaction with AC, AC associated quality of life (QOL), and cost-effectiveness.To assess the effect of PST frequency on TTR and other outcomes, at selected sites patients randomized to perform PST are assigned one of three test frequencies (weekly, twice weekly, or once every four weeks).

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Journal of Thrombosis and Thrombolysis
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Ciaran S. Phibbs

Relative to other age groups, the elderly are disproportionately likely to become seriously ill and to face burdensome medical expenditures.  Many middle-income countries like Colombia have begun experimenting with targeted public-sector health insurance.  By exploiting discontinuities in eligibility formulas for health insurance subsidies, this project evaluated the consequences of a large targeted health insurance program for the well-being of the elderly in Colombia.  The investigator presented his findings at a Research in Progress seminar in April 2008, and at the Univer

Encina Commons Room 101,
615 Crothers Way,
Stanford, CA 94305-6006

(650) 723-2714 (650) 723-1919
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Henry J. Kaiser, Jr. Professor
Professor, Health Policy
Senior Fellow at the Freeman Spogli Institute for International Studies
Senior Fellow at the Stanford Institute for Economic Policy Research
Professor, Economics (by courtesy)
grant_miller_vert.jpeg PhD, MPP

As a health and development economist based at the Stanford School of Medicine, Dr. Miller's overarching focus is research and teaching aimed at developing more effective health improvement strategies for developing countries.

His agenda addresses three major interrelated themes: First, what are the major causes of population health improvement around the world and over time? His projects addressing this question are retrospective observational studies that focus both on historical health improvement and the determinants of population health in developing countries today. Second, what are the behavioral underpinnings of the major determinants of population health improvement? Policy relevance and generalizability require knowing not only which factors have contributed most to population health gains, but also why. Third, how can programs and policies use these behavioral insights to improve population health more effectively? The ultimate test of policy relevance is the ability to help formulate new strategies using these insights that are effective.

Faculty Fellow, Stanford Center on Global Poverty and Development
Faculty Affiliate, Stanford Center for Latin American Studies
Faculty Affiliate, Woods Institute for the Environment
Faculty Affiliate, Interdisciplinary Program in Environment & Resources
Faculty Affiliate, Stanford Center on China's Economy and Institutions
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Objective: To assess the functional and behavioral health of unaccompanied Sudanese refugee minors approximately 1 year after resettlement in the United States.

Design: A descriptive survey.

Setting: Local refugee foster care programs affiliated with the US Unaccompanied Refugee Minors Program.

Participants: A total of 304 Sudanese refugee minors enrolled in the US Unaccompanied Refugee Minors Program.

Main Outcome Measures: Health outcomes were assessed using the Harvard Trauma Questionnaire and the Child Health Questionnaire. Outcomes included the diagnosis of posttraumatic stress disorder and scores on all Child Health Questionnaire subscales and global single-item assessments.

Results: Twenty percent of the minors had a diagnosis of posttraumatic stress disorder and were more likely to have lower (worse) scores on all the Child Health Questionnaire subscales. Low functional and behavioral health scores were seen mainly in functioning in the home and in subjective health ratings. Social isolation and history of personal injury were associated with posttraumatic stress disorder.

Conclusions: Unaccompanied Sudanese minors have done well in general. The minors function well in school and in activities; however, behavioral and emotional problems manifest in their home lives and emotional states. The subset of children with traumatic symptoms had characteristics that may distinguish them from their peers and that may inform future resettlement services for unaccompanied minors in the United States.

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Archives of Pediatrics & Adolescent Medicine
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Paul H. Wise
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Variation in use of health care is ubiquitous in the United States. It is attributable to exogenous differences in supply of medical resources; to identified and unidentified economic, social, and cultural factors; and to the idiosyncratic beliefs of physicians. It is perpetuated by the parochial character of much clinical practice. Patients in high-intensity areas do not appear to have better health outcomes: Much care is "flat of the curve." A more robust scientific foundation for clinical decisions could help to reduce variations, but major reform of health care financing is probably necessary to achieve substantial improvement in the organization and delivery of care.

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Health Affairs
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OBJECTIVES: This study was designed to evaluate the cost-effectiveness of screening patients with a B-type natriuretic peptide (BNP) blood test to identify those with depressed left ventricular systolic function. BACKGROUND: Asymptomatic patients with depressed ejection fraction (EF) may have less progression to heart failure if they can be identified and treated. METHODS: We used a decision model to estimate economic and health outcomes for different screening strategies using BNP and echocardiography to detect left ventricular EF 40% for men and women age 60 years. We used published data from community cohorts (gender-specific BNP test characteristics, prevalence of depressed EF) and randomized trials (benefit from treatment). RESULTS: Screening 1,000 asymptomatic patients with BNP followed by echocardiography in those with an abnormal test increased the lifetime cost of care (176,000 US dollars for men, 101,000 US dollars for women) and improved outcome (7.9 quality-adjusted life years [QALYs] for men, 1.3 QALYs for women), resulting in a cost per QALY of 22,300 US dollars for men and 77,700 US dollars for women. For populations with a prevalence of depressed EF of at least 1%, screening with BNP followed by echocardiography increased outcome at a cost 50,000 US dollars per QALY gained. Screening would not be attractive if a diagnosis of left ventricular dysfunction led to significant decreases in quality of life or income. CONCLUSIONS: Screening populations with a 1% prevalence of reduced EF (men at age 60 years) with BNP followed by echocardiography should provide a health benefit at a cost that is comparable to or less than other accepted health interventions.

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Journal of the American College of Cardiology
Authors
Paul A. Heidenreich
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BACKGROUND: Chronically ill patients often experience difficulty paying for their medications and, as a result, use less than prescribed.

OBJECTIVES: The objectives of this study were to determine the relationship between patients with diabetes' health insurance coverage and cost-related medication underuse, the association between cost-related underuse and health outcomes, and the role of comorbidity in this process.

RESEARCH DESIGN: We used a patient survey with linkage to insurance information and hemoglobin A1C (A1C) test results.

PATIENTS: We studied 766 adults with diabetes recruited from 3 Veterans Affairs (VA), 1 county, and 1 university healthcare system.

MAIN OUTCOMES: Main outcomes consisted of self-reported medication underuse as a result of cost, A1C levels, symptom burden, and Medical Outcomes Study 12-Item Short-Form physical and mental functioning scores.

RESULTS: Fewer VA patients reported cost-related medication underuse (9%) than patients with private insurance (18%), Medicare (25%), Medicaid (31%), or no health insurance (40%; P <0.0001). Underuse was substantially more common among patients with multiple comorbid chronic illnesses, except those who used VA care. The risk of cost-related underuse for patients with 3+ comorbidities was 2.8 times as high among privately insured patients as VA patients (95% confidence interval, 1.2-6.5), and 4.3 to 8.3 times as high among patients with Medicare, Medicaid, or no insurance. Individuals reporting cost-related medication underuse had A1C levels that were substantially higher than other patients (P <0.0001), more symptoms, and poorer physical and mental functioning (all P <0.05).

CONCLUSIONS: Many patients with diabetes use less of their medication than prescribed because of the cost, and those reporting cost-related adherence problems have poorer health. Cost-related adherence problems are especially common among patients with diabetes with comorbid diseases, although the VA's drug coverage may protect patients from this increased risk.

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Medical Care
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As policymakers consider expanding insurance coverage for the human immunodeficiency virus (HIV+) population, it is useful to ask whether insurance has any effect on health outcomes, and, if so, whether public insurance is as efficacious as private insurance in preventing premature death. Using data from a nationally representative cohort of HIV-infected persons receiving regular medical care, we estimate the impact of different types of insurance on mortality in this population. Our main findings are that (1) ignoring observed and unobserved health status misleads one to conclude that insurance may not be protective for HIV patients, (2) after accounting for observed and unobserved heterogeneity, insurance does protect against premature death, and (3) private insurance is more effective than public insurance. The better performance of private insurance can be explained in part by more restrictive Medicaid prescription drug policies that limit access to highly efficacious treatment.

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Journal of Health Economics
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