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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A susceptibility locus for coronary artery disease (CAD) at chromosome 9p21 has recently been reported, which may influence the age of onset of CAD. We sought to replicate these findings among white subjects and to examine whether these results are consistent with other racial/ethnic groups by genotyping three single nucleotide polymorphisms (SNPs) in the risk interval in the Atherosclerotic Disease, Vascular Function, and Genetic Epidemiology (ADVANCE) study. One or more of these SNPs was associated with clinical CAD in whites, U.S. Hispanics and U.S. East Asians. None of the SNPs were associated with CAD in African Americans although the power to detect an odds ratio (OR) in this group equivalent to that seen in whites was only 24–30%. ORs were higher in Hispanics and East Asians and lower in African Americans, but in all groups the 95% confidence intervals overlapped with ORs observed in whites. High-risk alleles were also associated with increased coronary artery calcification in controls and the magnitude of these associations by racial/ethnic group closely mirrored the magnitude observed for clinical CAD. Unexpectedly, we noted significant genotype frequency differences between male and female cases (P = 0.003–0.05). Consequently, men tended towards a recessive and women tended towards a dominant mode of inheritance. Finally, an effect of genotype on the age of onset of CAD was detected but only in men carrying two versus one or no copy of the high-risk allele and presenting with CAD at age >50 years. Further investigations in other populations are needed to confirm or refute our findings.

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Human Molecular Genetics
Authors
Mark A. Hlatky
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OBJECTIVES: In response to growing concerns about sexual violence as an underrecognized traumatic consequence of military service, Veterans Health Administration policy requires universal screening for sexual trauma sustained during military service. This prospective study, the first to evaluate national efforts to screen for military sexual trauma, investigated whether sexual trauma screening is associated with increased utilization of mental health services.

METHODS: This study examined data for all male (N=540,381) and female (N=33,259) veterans who had valid responses to screens for military sexual trauma in 2005. The use of mental health services during the three months after screening was examined for persons who screened positive for military sexual trauma and for those who screened negative. Findings were stratified by use of mental health services in the six months before the screening.

RESULTS: Compared with negative screens, positive screens were associated with significantly increased rates of postscreen mental health treatment. A more than twofold increase was observed for patients without previous use of mental health treatment (women: relative risk [RR]=2.52, 95% confidence interval [CI]= 2.38–2.66; men: RR=2.47, 95% CI=2.34–2.61). In this group, the number of positive screens needed for one additional patient to access treatment was 5.5 for women and 7.2 for men.

CONCLUSIONS: Our findings suggest that detection via screening is associated with increased rates of mental health treatment. An effective screening program that promotes detection of sexual trauma and access to mental health care can help to reduce the burden of psychiatric illness for those who have experienced military sexual trauma.

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Psychiatric Services
Authors
Mark W. Smith
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We evaluated the frequency of HIV testing across the Department of Veterans Affairs (VA), the largest provider of HIV care in the United States. An electronic survey was used to determine the volume and location of HIV screening, confirmatory testing, rapid testing and laboratory consent policies in VA medical centers between October 1, 2005, and September 30, 2006. One hundred thirty-five VA laboratories reported that 112,033 HIV screening tests were performed (81% outpatients vs. 19% inpatients, p<.0001). Overall HIV prevalence was 1.49% (1.62% in inpatients vs. 1.46% in outpatients, p=N.S., range=0.2-3.8%). Rapid testing was available in 67% of facilities, 60% of which took place in the clinical laboratory. Sixty-four percent of labs required a copy of the informed consent in order to perform testing. We estimate that fewer than 10% of VA inpatients and fewer than 5% of VA outpatients were tested for HIV during the survey period. Substantial opportunities for increasing routine HIV testing exist in this population.

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AIDS Education and Prevention
Authors
Mark Holodniy
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Although HIV infection is more prevalent in people younger than age 45 years, a substantial number of infections occur in older persons. Recent guidelines recommend HIV screening in patients age 13 to 64 years. The cost-effectiveness of HIV screening in patients age 55 to 75 years is uncertain. OBJECTIVE: To examine the costs and benefits of HIV screening in patients age 55 to 75 years. DESIGN: Markov model. DATA SOURCES: Derived from the literature. TARGET POPULATION: Patients age 55 to 75 years with unknown HIV status. TIME HORIZON: Lifetime. PERSPECTIVE: Societal. INTERVENTION: HIV screening program for patients age 55 to 75 years compared with current practice. OUTCOME MEASURES: Life-years, quality-adjusted life-years (QALYs), costs, and incremental cost-effectiveness. RESULTS OF BASE-CASE ANALYSIS: For a 65-year-old patient, HIV screening using traditional counseling costs $55,440 per QALY compared with current practice when the prevalence of HIV was 0.5% and the patient did not have a sexual partner at risk. In sexually active patients, the incremental cost-effectiveness ratio was $30,020 per QALY. At a prevalence of 0.1%, HIV screening cost less than $60,000 per QALY for patients younger than age 75 years with a partner at risk if less costly streamlined counseling is used. RESULTS OF SENSITIVITY ANALYSIS: Cost-effectiveness of HIV screening depended on HIV prevalence, age of the patient, counseling costs, and whether the patient was sexually active. Sensitivity analyses with other variables did not change the results substantially. LIMITATIONS: The effects of age on the toxicity and efficacy of highly active antiretroviral therapy and death from AIDS were uncertain. Sensitivity analyses exploring these variables did not qualitatively affect the results. CONCLUSION: If the tested population has an HIV prevalence of 0.1% or greater, HIV screening in persons from age 55 to 75 years reaches conventional levels of cost-effectiveness when counseling is streamlined and if the screened patient has a partner at risk. Screening patients with advanced age for HIV is economically attractive in many circumstances.

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Journal Articles
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Ann Intern Med
Authors
Mark Holodniy
Douglas K. Owens
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OBJECTIVES: The purposes of this study were to develop a pediatric-focused tool for adverse drug event detection and describe the incidence and characteristics of adverse drug events in children's hospitals identified by this tool.

METHODS: A pediatric-specific trigger tool for adverse drug event detection was developed and tested. Eighty patients from each site were randomly selected for retrospective chart review. All adverse drug events identified using the trigger tool were evaluated for severity, preventability, ability to mitigate, ability to identify the event earlier, and presence of associated occurrence report. Each trigger and the entire tool were evaluated for positive predictive value.

RESULTS: Review of 960 randomly selected charts from 12 children's hospitals revealed 2388 triggers (2.49 per patient) and 107 unique adverse drug events. Mean adverse drug event rates were 11.1 per 100 patients, 15.7 per 1000 patient-days, and 1.23 per 1000 medication doses. The positive predictive value of the trigger tool was 3.7%. Twenty-two percent of all adverse drug events were deemed preventable, 17.8% could have been identified earlier, and 16.8% could have been mitigated more effectively. Ninety-seven percent of the identified adverse drug events resulted in mild, temporary harm. Only 3.7% of adverse drug events were identified in existing hospital-based occurrence reports. The most common adverse drug events identified were pruritis and nausea, the most common medication classes causing adverse drug events were opioid analgesics and antibiotics, and the most common stages of the medication management process associated with preventable adverse drug events were monitoring and prescribing/ordering.

CONCLUSIONS: Adverse drug event rates in hospitalized children are substantially higher than previously described. Most adverse drug events resulted in temporary harm, and 22% were classified as preventable. Only 3.7% were identified by using traditional voluntary reporting methods. Our pediatric-focused trigger tool is effective at identifying adverse drug events in inpatient pediatric populations.

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Journal Articles
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Pediatrics
Authors
Paul J. Sharek
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OBJECTIVES: Narcotic-related adverse drug events are the most common adverse drug events in hospitalized children. Despite multiple published studies describing interventions that decrease adverse drug events from narcotics, large-scale collaborative quality improvement efforts to address narcotic-related adverse drug events in pediatrics have not been described. The purpose of this study was to evaluate collaborative-wide narcotic-related adverse drug event rates after a collection of expert panel-defined best practices was implemented.

METHODS: All 42 children's hospitals in the Child Health Corporation of America were invited to participate in the Institute for Healthcare Improvement-style quality improvement collaborative aimed at reducing narcotic-related adverse drug events. A collection of interventions known or suspected to reduce narcotic-related adverse drug events was recommended by an expert panel, with each site implementing >or=1 of these best practices on the basis of local need. Narcotic-related adverse drug event rates were compared between the baseline (December 1, 2004, to March 31, 2005) and postimplementation periods (January 1, 2006, to March 31, 2006) after an a priori-defined intervention ramp-up time (April 1, 2005, and December 31, 2005). Secondary outcome measures included constipation rates and narcotic-related automated drug-dispensing-device override percentages.

RESULTS: Median narcotic-related adverse drug event rates decreased 67% between the baseline and postimplementation time frames across the 14-site collaborative. Constipation rates decreased 68.9%, and automated drug-dispensing-device overrides decreased from 10.18% to 5.91% of all narcotic doses administered.

CONCLUSIONS: Implementation of >or=1 expert panel-recommended interventions at each participating site resulted in a significant decrease in narcotic-related adverse drug events, constipation, and automated drug-dispensing-device overrides in a 12-month, 14-site children's hospital quality collaborative.

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Pediatrics
Authors
Paul J. Sharek
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Objective: To investigate coronary heart disease (CHD) morbidity and mortality and their patterning by socioeconomic status among diabetic and nondiabetic individuals in Finland.

Methods: All diabetic persons aged 35-74 years entitled to free anti-diabetic medication were drawn from the 1991-1996 national health insurance files along with nondiabetic referents. Outcome events for up to 6 years of follow-up, corresponding to 418,987 and 867,813 person-years in diabetic and nondiabetic people, respectively, were identified from national health insurance, hospital discharge and causes of death registers using personal identification codes.

Results: The annual CHD incidence for diabetic women and men was 2.7% and 3.7%, respectively, corresponding to relative risks of 3.55 (95% CI: 3.43-3.67) and 2.64 (95% CI: 2.56-2.72) compared to nondiabetic persons. The impact of diabetes on CHD mortality was greater, with relative death rates of 6.04 and 3.42 for women and men, respectively. CHD mortality and incidence displayed systematic socioeconomic trends with higher rates among worse-off diabetic and nondiabetic people, although gradients were generally steeper for nondiabetics. In the diabetic population, socioeconomic differences were rather similar for sudden CHD deaths and nonfatal CHD incident cases. For both genders, socioeconomic differences in mortality after CHD diagnosis were small in both diabetic and nondiabetic persons, except for the lowest compared to the highest income quintile.

Conclusions: Socioeconomic CHD mortality differences among diabetic people in Finland were mainly explained by higher CHD incidence and particularly sudden deaths without prior CHD diagnosis. No systematic socioeconomic differences were found in long-term prognosis after CHD diagnosis.

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Journal of Diabetes and Its Complication
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Palo Alto Medical Foundation Research Institute
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hluft2.jpg PhD

Harold S. Luft, PhD, is Director of the Palo Alto Medical Foundation Research Institute (PAMFRI). He is also the Caldwell B. Esselstyn Professor Emeritus of Health Policy and Health Economics at the Philip R. Lee Institute for Health Policy Studies at the University of California, San Francisco. He was Director of the Institute from 1993 through 2007. Professor Luft received his AB, MA, and PhD in economics (specializing in health sector economics and public finance) from Harvard University. His research has covered a wide range of areas, including medical care utilization, health maintenance organizations, hospital market competition, volume, quality and outcomes of hospital care, risk assessment and risk adjustment, and health care market reform. He has been involved in postdoctoral training for over 30 years, serving as co-director or associate director for three training programs sponsored jointly by UCSF and UC Berkeley and continues mentoring fellows at PAMFRI. He is a member of the Institute of Medicine and served six years on the IOM Council. He chaired and was a member of the National Advisory Council of the Agency for Health Care Policy and Research (now the Agency for Healthcare Research and Quality). He served on the board of AcademyHealth for 10 years and was senior associate editor and then co-editor of the journal of Health Services Research between 1997 and 2006. He has authored or co-authored and edited a number of books and authored or co-authored over 200 articles in scientific journals. His book, Total Cure: The Antidote to the Health Care Crisis, was published by Harvard University Press in October 2008.

Director, Palo Alto Medical Foundation Research Institute
Caldwell B. Esselstyn Professor of Health Policy and Health Economics, Emeritus, UCSF
Adjunct Affiliate at the Center for Health Policy and the Department of Health Policy
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