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A team of SHP faculty and researchers, together with Stanford Medicine graduate and medical students and in collaboration with colleagues at CIDE in Mexico, have launched a modeling framework to investigate the epidemiology of COVID-19 and to support pro-active resource planning and policy evaluations for diverse populations and geographies — including California, Mexico and India.

The Stanford-CIDE Coronavirus Simulation Model — or SC-COSMO — incorporates realistic demography and patterns of contacts sufficient for transmission of the virus that has infected more than 2 million people worldwide and claimed more than 125,600 lives, according to the widely used Johns Hopkins COVID-19 map which is updated several times a day.

The SC-COSMO model also incorporates non-pharmaceutical interventions, such as social distancing, timing and effects on reductions in contacts which may differ by demography.

Jeremy Goldhaber-Fiebert, an associate professor of medicine at Stanford Health Policy, is the principal investigator of the project, along with Fernando Alarid-Escudero, an assistant professor at the Center for Research and Teaching in Economics (CIDE) in Mexico and Jason Andrews, an assistant professor of medicine (infectious diseases) at Stanford Medicine. Other SHP faculty among the 20 investigators and staff members who are working on the project are Joshua Salomon and David Studdert, both professors of medicine.

The model also allows for the comparison of many future what-if scenarios and how they might impact outcomes over time and cumulatively.

The SC-COSMO team is a multi-disciplinary, multi-institutional team including expertise and experience in infectious disease, epidemiology, mathematical modeling and simulation, statistics, decision science, health policy, health law and health economics.

“As COVID-19 transmission occurs throughout the world’s diverse populations, it is critical to efficiently model and forecast its future spread between and within these populations and to appropriately reflect uncertainty in modeled outcomes,” Goldhaber-Fiebert said. “Doing so supports timely resource planning and decision making between potentially appropriate and effective interventions that balance the trade-offs they embody.”

The team is currently working on three projects:

  1. The researchers are providing California with county-level COVID-19 estimates for such things as the number of infections, detected cases and projections of future needs for hospital and ICU beds, personal protective equipment (PPE) and ventilators.
  2. The project is working on potential strategies to mitigate the COVID-19 pandemic in Mexico by focusing on three specific objectives: collecting, synthesizing and openly sharing the most relevant and useful data; accelerating the development of the SC-COSMO model and its adaptation to the Mexican situation; and identifying a set of mitigation strategies, comparing the health and economic consequences in the population in the medium and long term.
  3. They are developing forecast models of the COVID-19 epidemic in India with the Wadhwani Institute of Artificial Intelligence and its Indian government partners, providing a rapid response to urgent needs for planning and resource allocation.

 

jeremy

Jeremy Goldhaber-Fiebert

Associate Professor of Medicine
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.

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Federalism Meets the COVID-19 Pandemic: Thinking Globally, Acting Locally

Federalism Meets the COVID-19 Pandemic: Thinking Globally, Acting Locally
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The Stanford-CIDE Coronavirus Simulation Model — or SC-COSMO — incorporates realistic demography and patterns to investigate resource planning and policy evaluations for diverse populations and geographies in California, Mexico and India.

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Historically, improvements in the quality of municipal drinking water made important contributions to mortality decline in wealthy countries. However, water disinfection often does not produce equivalent benefits in developing countries today. We investigate this puzzle by analyzing an abrupt, large-scale municipal water disinfection program in Mexico in 1991 that increased the share of Mexico’s population receiving chlorinated water from 55% to 85% within six months. We find that on average, the program was associated with a 37 to 48% decline in diarrheal disease deaths among children (over 23,000 averted deaths per year) and was highly cost-effective (about $1,310 per life year saved). However, we also find evidence that age (degradation) of water pipes and lack of complementary sanitation infrastructure play important roles in attenuating these benefits. Countervailing behavioral responses, although present, appear to be less important.

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National Bureau of Economic Research
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Grant Miller
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The decision by voters in Colorado and Washington state to legalize the recreational use of marijuana has “changed the rules of the game” for the administration of Mexican President-elect Enrique Peña Nieto in the U.S.-backed drug war, according to a report by the Washington Post’s William Booth.
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Genetic mapping has led scientists to a better understanding of human disease and how to fight ailments like diabetes, mental illness and cancer.

But the information they have to work with is limited, drawing mostly from the DNA of people with European bloodlines. When it comes to figuring out how genetic disorders affect groups who don’t share that ancestry or have only trace amounts of it in their family histories, researchers are often at a loss.

Andres Moreno is changing that. Thanks to the $100,000 he is receiving as this year’s recipient of the George Rosenkranz Prize for Health Care Research in Developing Countries, the Stanford researcher will analyze the DNA of indigenous groups and cosmopolitan populations living in Mexico, South America and the Caribbean.

The data he gathers will lay the groundwork for scientists interested in knowing how genetic diseases take hold and manifest themselves among Latin Americans – one of the most underrepresented populations in the field of genetics.

“We can’t start talking about how to deliver personalized medicine in Latin America because we still have much to learn about their genetic makeup at the population level,” said Moreno, a research associate at School of Medicine’s genetics department.

“We need to draw the genetic map that will allow us to better understand the genetic basis of multiple conditions that lead to major health problems in Latin America,” he said.

Scientists have found numerous genetic variants linked to complex traits among people with European backgrounds, and that connection has allowed doctors to better treat and prevent diseases in that group.

But without a rich database built on the DNA of people whose family trees are rooted in Latin America, researchers have yet to find the genetic key to explain why descendants of region’s indigenous populations are predisposed to particular conditions.

Obesity, for example, is more prevalent in Mexico than in other parts of the world, Moreno said.

“We need to find population-specific gene variants that don’t exist anywhere else but locally,” he said. “Then we can maybe find the gene behind obesity there.”

Other conditions may be addressed by studying locally adapted populations, such as those living at high altitude in the Andes where pregnant women have a five-fold higher rate of maternal hypertension than the native population.

“We are trying to identify the genetic variants underlying the mechanisms for this protection, which may help to design preventive and therapeutic measures worldwide,” Moreno said.

Stanford’s Center for Health Policy, a center of the university’s Freeman Spogli Institute for International Studies, administers the Rosenkranz award that will fund Moreno’s work. The prize was created in 2007 to foster the research of a young Stanford scholar committed to improving health care in developing countries and reducing health disparities across the globe.

The first recipient was Eran Bendavid, an assistant professor of medicine and a CHP associate.

“We believe Andres’ work will deepen our understanding of the genetics of disease across populations, and we are delighted to recognize his important scientific contributions,” said Douglas Owens, director of the Center for Health Policy, the Henry J. Kaiser, Jr. Professor in the School of Medicine and an FSI senior fellow.

The Rosenkranz prize was established by the friends and family of Dr. George Rosenkranz, the scientist who helped first synthesize Cortizone in Mexico in 1951.

Rosenkranz, who lives in Menlo Park, also synthesized the active ingredient for the first oral birth control and served as a CEO of Syntex, a Mexican pharmaceutical company.

In addition to Owens, members of the award selection committee included: Donald Kennedy, president emeritus of Stanford; Rosamond Naylor, the William Wrigley Senior Fellow at FSI and Stanford’s Woods Institute for the Environment; Paul Yock, the Martha Meier Weiland Professor in the medical school; and Michele Barry, the medical school’s senior associate dean of global health and director of the Center for Innovation in Global Health.

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Young Stanford researchers focusing on improving health care access in developing countries are eligible for the Dr. George Rosenkranz Prize.

The $100,000 award is given to a non-tenured professor, post-doctoral student or research associate during a two-year period. The deadline to apply is May 11. The recipient will be announced in early June

Rosenkranz, who helped first synthesize Cortisone in 1951 and went on to synthesize progestin  – the active ingredient for the first oral birth control – dedicated his career to improving health care access around the world. Born in Hungary in 1916, the chemist started his career in Mexico and helped establish the Mexican National Institute for Genomic Medicine. He lives with his wife in Menlo Park.

The award is being funded by the Rosenkranz family and administered by Stanford Health Policy, a center within the Freeman Spogli Institute for International Studies and the Center for Primary Care and Outcomes Research. It also is designed to give its recipients access to a network that will help them develop their careers.

Eran Bendavid, a SHP affiliate and Stanford Medical School instructor, received the first award in 2010 to support his analysis of whether money going to HIV and malaria programs in sub-Saharan Africa has improved the overall health of children and their mothers.

More application information is available at http://healthpolicy.stanford.edu/fellowships/rosenkranz_prize.

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Objective To determine whether the Mexico City Policy, a United States government policy that prohibits funding to nongovernmental organizations performing or promoting abortion, was associated with the induced abortion rate in sub-Saharan Africa.

Methods Women in 20 African countries who had induced abortions between 1994 and 2008 were identified in Demographic and Health Surveys. A country’s exposure to the Mexico City Policy was considered high (or low) if its per capita assistance from the United States for family planning and reproductive health was above (or below) the median among study countries before the policy’s reinstatement in 2001. Using logistic regression and a difference-in-difference design, the authors estimated the differential change in the odds of having an induced abortion among women in high exposure countries relative to low exposure countries when the policy was reinstated.

Findings The study included 261 116 women aged 15 to 44 years. A comparison of 1994–2000 with 2001–2008 revealed an adjusted odds ratio for induced abortion of 2.55 for high-exposure countries versus low-exposure countries under the policy (95% confidence interval, CI: 1.76–3.71). There was a relative decline in the use of modern contraceptives in the high-exposure countries over the same time period.

Conclusion The induced abortion rate in sub-Saharan Africa rose in high-exposure countries relative to low-exposure countries when the Mexico City Policy was re- introduced. Reduced financial support for family planning may have led women to substitute abortion for contraception.Regardless of one’s views about abortion, the findings may have important implications for public policies governing abortion.

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Bulletin of the World Health Organization (published online)
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Eran Bendavid
Grant Miller
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BACKGROUND: The burden of hypertension and related health care needs among Mexican Americans will likely increase substantially in the near future.

OBJECTIVES: In a nationally representative sample of U.S. Mexican American adults we examined: 1) the full range of blood pressure categories, from normal to severe; 2) predictors of hypertension awareness, treatment and control and; 3) prevalence of comorbidities among those with hypertension.

DESIGN: Cross-sectional analysis of pooled data from the National Health and Nutrition Examination Surveys (NHANES), 1999-2004. PARTICIPANTS: The group of participants encompassed 1,359 Mexican American women and 1,421 Mexican American men, aged 25-84 years, who underwent a standardized physical examination.

MEASUREMENTS: Physiologic measures of blood pressure, body mass index, and diabetes. Questionnaire assessment of blood pressure awareness and treatment.

RESULTS: Prevalence of Stage 1 hypertension was low and similar between women and men ( approximately 10%). Among hypertensives, awareness and treatment were suboptimal, particularly among younger adults (65% unaware, 71% untreated) and those without health insurance (51% unaware, 62% untreated). Among treated hypertensives, control was suboptimal for 56%; of these, 23% had stage >/=2 hypertension. Clustering of CVD risk factors was common; among hypertensive adults, 51% of women and 55% of men were also overweight or obese; 24% of women and 23% of men had all three chronic conditions-hypertension, overweight/obesity and diabetes.

CONCLUSION: Management of hypertension in Mexican American adults fails at multiple critical points along an optimal treatment pathway. Tailored strategies to improve hypertension awareness, treatment and control rates must be a public health priority.

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Journal of General Internal Medicine
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Randall S. Stafford
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The patient was a 41 year-old Mexican American women who presented with a decrease in visual acuity along with periorbital and peripheral edema. She was diagnosed with bilateral serous retinal detachment and diffuse proliferative lupus nephritis. She improved considerably in hospital after treatment with corticosteroids.

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Cases Journal
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OBJECTIVE: To examine parent concerns about development, learning, and behavior for young children of Mexican origin, and to identify whether these reports differ by families' citizenship/documentation status.

METHODS: Data come from the 2005 California Health Interview Survey, a population-based random-digit dial telephone survey of California's noninstitutionalized population. California Health Inerview Survey (CHIS) investigators completed interviews of 43 020 households with a total of 5856 children under age 6 years, of whom 1786 were reported being of Mexican origin. Developmental risk was measured by parent concerns elicited by the Parents' Evaluation of Developmental Status. We used bivariate and multivariate analyses to examine associations between developmental risk and family citizenship/documentation status (parents are undocumented, at least one documented noncitizen parent, or both parents are US citizens) among children of Mexican origin and US-born non-Latino white children, after adjusting for age, income, parental education, and predominant household language.

RESULTS: In multivariate analyses, children of Mexican origin did not differ significantly from US-born white children in developmental risk (odds ratio 1.12, 95% confidence interval 0.88-1.42). In subgroup analyses, children of Mexican origin with undocumented parents had higher odds of developmental risk (odds ratio 1.53, 95% confidence interval 1.00-2.33) than non-Latino white children whose parents were citizens, after adjusting for confounders.

CONCLUSIONS: Mexican children with undocumented parents have greater parent-reported developmental risk than Mexican and white children whose parents are US citizens or otherwise legally documented. More research is needed to understand the roles of immigration stress and home environments on the developmental risks of children in households with undocumented parents.

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Academic Pediatrics
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