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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BACKGROUND: Although evidence suggests that a higher hemodialysis dose and/or frequency may be associated with improved outcomes, the cost-effectiveness of a daily hemodialysis strategy for critically ill patients with acute kidney injury (AKI) is unknown. METHODS: We developed a Markov model of the cost, quality of life, survival, and incremental cost-effectiveness of daily hemodialysis, compared with alternate-day hemodialysis, for patients with AKI in the intensive care unit (ICU). We employed a societal perspective with a lifetime analytic time horizon. We modeled the efficacy of daily hemodialysis as a reduction in the relative risk of death on the basis of data reported in the 2004 clinical trial published by Schiffl et al. We performed 1- and 2-way sensitivity analyses across cost, efficacy, and utility input variables. The main outcome measure was cost per quality-adjusted life-year (QALY). RESULTS: In the base case for a 60-year-old man, daily hemodialysis was projected to add 2.14 QALYs and $10,924 in cost. We found that the cost-effectiveness of daily hemodialysis compared with alternate-day hemodialysis was $5084 per QALY gained. The incremental cost-effectiveness ratio became less favorable (>$50,000 per QALY gained) when the maintenance hemodialysis rate of the daily hemodialysis group was varied to more than 27% and when the difference in 14-day postdischarge mortality between the alternatives was varied to less than 0.5%. CONCLUSION: Daily hemodialysis is a cost-effective strategy compared with alternate-day hemodialysis for patients with severe AKI in the ICU.

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Archives of Internal Medicine
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Douglas K. Owens
Glenn M. Chertow

Encina Commons, Room 220
615 Crothers Way
Stanford, CA 94305-6006

(650) 721-2486 (650) 723-1919
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Professor, Health Policy
jeremy-fisch_profile_compressed.jpg PhD

Jeremy Goldhaber-Fiebert, PhD, is a Professor of Health Policy, a Core Faculty Member at the Center for Health Policy and the Department of Health Policy, and a Faculty Affiliate of the Stanford Center on Longevity and Stanford Center for International Development. His research focuses on complex policy decisions surrounding the prevention and management of increasingly common, chronic diseases and the life course impact of exposure to their risk factors. In the context of both developing and developed countries including the US, India, China, and South Africa, he has examined chronic conditions including type 2 diabetes and cardiovascular diseases, human papillomavirus and cervical cancer, tuberculosis, and hepatitis C and on risk factors including smoking, physical activity, obesity, malnutrition, and other diseases themselves. He combines simulation modeling methods and cost-effectiveness analyses with econometric approaches and behavioral economic studies to address these issues. Dr. Goldhaber-Fiebert graduated magna cum laude from Harvard College in 1997, with an A.B. in the History and Literature of America. After working as a software engineer and consultant, he conducted a year-long public health research program in Costa Rica with his wife in 2001. Winner of the Lee B. Lusted Prize for Outstanding Student Research from the Society for Medical Decision Making in 2006 and in 2008, he completed his PhD in Health Policy concentrating in Decision Science at Harvard University in 2008. He was elected as a Trustee of the Society for Medical Decision Making in 2011.

Past and current research topics:

  1. Type 2 diabetes and cardiovascular risk factors: Randomized and observational studies in Costa Rica examining the impact of community-based lifestyle interventions and the relationship of gender, risk factors, and care utilization.
  2. Cervical cancer: Model-based cost-effectiveness analyses and costing methods studies that examine policy issues relating to cervical cancer screening and human papillomavirus vaccination in countries including the United States, Brazil, India, Kenya, Peru, South Africa, Tanzania, and Thailand.
  3. Measles, haemophilus influenzae type b, and other childhood infectious diseases: Longitudinal regression analyses of country-level data from middle and upper income countries that examine the link between vaccination, sustained reductions in mortality, and evidence of herd immunity.
  4. Patient adherence: Studies in both developing and developed countries of the costs and effectiveness of measures to increase successful adherence. Adherence to cervical cancer screening as well as to disease management programs targeting depression and obesity is examined from both a decision-analytic and a behavioral economics perspective.
  5. Simulation modeling methods: Research examining model calibration and validation, the appropriate representation of uncertainty in projected outcomes, the use of models to examine plausible counterfactuals at the biological and epidemiological level, and the reflection of population and spatial heterogeneity.
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INTRODUCTION: By providing timely care at all steps along the continuum of lung cancer care, providers may be able to limit disease progression before treatment and possibly improve clinical outcomes. This study examines the timeliness of key events in the process of care between initial radiograph and first treatment. METHODS: Dates of key events were extracted from the medical records of 2463 veterans receiving lung cancer care at 133 Department of Veterans Affairs (VA) facilities. After reviewing their site's abstraction results, facility leaders completed a survey on their perceptions of their local processes of lung cancer care. RESULTS: Median time from first radiography to first treatment was 71 days. The longest intermediate time interval examined was between first treatment referral and first treatment (median = 12 days). Time from first to last diagnostic test was most variable (interquartile range = 0-27 days). We found a significant trend indicating that the time interval from first radiograph to treatment was shorter for patients with more advanced disease. This effect was also significant within six of the seven intermediate time intervals we examined. Survey responses indicated that the chart review process stimulated improvement activity. CONCLUSIONS: Although patients with earlier stage disease benefit more from treatment, they do not proceed as quickly through the continuum of care as patients with more advanced disease. By measuring variability in timeliness of care at multiple steps in the lung cancer care process, facilities may identify opportunities for improvement.

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Journal of Thoracic Oncology
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PRIMARY AIM: Examine the effectiveness of extended cognitive behavior therapy (CBT) in promoting longer-term smoking abstinence.

DESIGN: Open-label treatment phase followed by extended treatment phase. Randomization conducted prior to entry into open-label treatment phase; analysis based on intention-to-treat to avoid threat of selection bias.

SETTING: Community smoking cessation clinic.

PARTICIPANTS: A total of 304 adult smokers (> or = 18 years of age; > or = 10 cigarettes/day). INTERVENTION: Open-label (8 weeks): all participants received bupropion SR, nicotine patch, CBT. Extended treatment (12 weeks): participants received either CBT + voicemail monitoring and telephone counseling or telephone-based general support.

MEASUREMENTS: Seven-day point prevalence abstinence, expired-air carbon monoxide. RESULTS: At week 20 follow-up, CBT produced a higher 7-day point prevalence abstinence rate: 45% versus 29%, P = 0.006; at 52 weeks the difference in abstinence rates (31% versus 27%) was not significant. History of depression was a moderator of treatment. Those with a positive history had a better treatment response at 20 weeks when assigned to the less intensive telephone support therapy (P < 0.05).

CONCLUSION: The superiority of CBT to 20 weeks suggests that continued emphasis on the development of cognitive and behavioral strategies for maintaining non-smoking during an extended treatment phase may help smokers to maintain abstinence in the longer term. At present, the minimum duration of therapy is unknown.

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Addiction
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OBJECTIVE: To examine the quantity (density) and location (proximity) of tobacco outlets and retail cigarette advertising in high school neighborhoods and their association with school smoking prevalence.

METHODS: Data from the 135 high schools that participated in the 2005-2006 California Student Tobacco Survey were combined with retailer licensing data about the location of tobacco outlets within walking distance (1/2 mi or 805 m) of the schools and with observations about the quantity of cigarette advertising in a random sample of those stores (n=384). Multiple regressions, adjusting for school and neighborhood demographics, tested the associations of high school smoking prevalence with the density of tobacco outlets and retail cigarette advertising and with the proximity of tobacco outlets to schools.

RESULTS: The prevalence of current smoking was 3.2 percentage points higher at schools in neighborhoods with the highest tobacco outlet density (>5 outlets) than in neighborhoods without any tobacco outlets. The density of retail cigarette advertising in school neighborhoods was similarly associated with high school smoking prevalence. However, neither the presence of a tobacco outlet within 1000 ft of a high school nor the distance to the nearest tobacco outlet from school was associated with smoking prevalence.

CONCLUSIONS: Policy efforts to reduce adolescent smoking should aim to reduce the density of tobacco outlets and retail cigarette advertising in school neighborhoods. This may be achieved through local zoning ordinances, including limiting the proximity of tobacco outlets to schools.

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Preventative Medicine
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OBJECTIVES: With >6 million hospital stays, costing almost $50 billion annually, hospitalized children represent an important population for which most inpatient quality indicators are not applicable. Our aim was to develop indicators using inpatient administrative data to assess aspects of the quality of inpatient pediatric care and access to quality outpatient care.

METHODS: We adapted the Agency for Healthcare Research and Quality quality indicators, a publicly available set of measurement tools refined previously by our team, for a pediatric population. We systematically reviewed the literature for evidence regarding coding and construct validity specific to children. We then convened 4 expert panels to review and discuss the evidence and asked them to rate each indicator through a 2-stage modified Delphi process. From the 2000 and 2003 Agency for Healthcare Research and Quality Healthcare Cost and Utilization Project Kids' Inpatient Database, we generated national estimates for provider level indicators and for area level indicators.

RESULTS: Panelists recommended 18 indicators for inclusion in the pediatric quality indicator set based on overall usefulness for quality improvement efforts. The indicators included 13 hospital-level indicators, including 11 based on complications, 1 based on mortality, and 1 based on volume, as well as 5 area-level potentially preventable hospitalization indicators. National rates for all 18 of the indicators varied minimally between years. Rates in high-risk strata are notably higher than in the overall groups: in 2003 the decubitus ulcer pediatric quality indicator rate was 3.12 per 1000, whereas patients with limited mobility experienced a rate of 22.83. Trends in rates by age varied across pediatric quality indicators: short-term complications of diabetes increased with age, whereas admissions for gastroenteritis decreased with age.

CONCLUSIONS: Tracking potentially preventable complications and hospitalizations has the potential to help prioritize quality improvement efforts at both local and national levels, although additional validation research is needed to confirm the accuracy of coding.

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Pediatrics
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Women's choices appear to emphasize child welfare more than those of men. This paper presents new evidence on how suffrage rights for American women helped children to benefit from the scientific breakthroughs of the bacteriological revolution. Consistent with standard models of electoral competition, suffrage laws were followed by immediate shifts in legislative behavior and large, sudden increases in local public health spending. This growth in public health spending fueled large-scale door-to-door hygiene campaigns, and child mortality declined by 8-15 percent (or 20,000 annual child deaths nationwide) as cause-specific reductions occurred exclusively among infectious childhood killers sensitive to hygienic conditions.

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Quarterly Journal of Economics
Authors
Grant Miller

Division of Nephrology
Stanford University School of Medicine
780 Welch Road, Suite 106
Palo Alto, CA 94034

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Norman S. Coplon/Satellite Healthcare Professor of Medicine and Professor, by courtesy, of Epidemiology and Population Health and of Health Policy
Associate Chair, Department of Medicine
glenn_chertow_.jpg MD, MPH

Glenn M. Chertow, MD, MPH, is Professor of Medicine and Chief, Division of Nephrology at Stanford University School of Medicine.  Prior to joining the faculty at Stanford, Dr. Chertow served with distinction on the faculties at Brigham and Women’s Hospital and Harvard Medical School (1995-98) and the University of California San Francisco (UCSF) (1998-2007).  Dr. Chertow has established a successful career as a clinical investigator and continues to maintain a productive research program focused on improving care for persons with acute and chronic kidney disease (CKD).  Recent projects include several NIDDK-sponsored initiatives: Acute Renal Failure Trials Network (ATN) Study, the United States Renal Data System (USRDS) Special Studies Center in Nutrition, the Chronic Renal Insufficiency Cohort (CRIC) study and the Frequent Hemodialysis Network (FHN) study. 

Dr. Chertow was elected to the American Society of Clinical Investigation in 2004 and appointed to the Scientific Advisory Board of the National Kidney Foundation in 2007.  He was Vice Chair and member of two workgroups for the Kidney Disease Quality Outcomes Initiative (K/DOQI) and Associate Editor of the Journal of the American Society of Nephrology

He will be among the five Co-Editors of the 9th edition of Brenner & Rector’s The Kidney.  Dr. Chertow also received the 2007 National Torchbearer Award from the American Kidney Fund for his career-long contributions toward improving the lives of persons with kidney disease.

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