Resources Repository
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ArticlePublication 2020Testing for SARS-CoV-2 Antibodies
Antibody testing can determine previous exposure to SARS-CoV-2 virus. Recently, the UK government has made …
Antibody testing can determine previous exposure to SARS-CoV-2 virus. Recently, the UK government has made antibody testing available to anyone wanting it, even if there is no clinical indication. The purpose of this article is to provide guidance for when to consider antibody testing in individuals with and without symptoms suggestive of current or past SARS-CoV-2 infection. Key points made by the authors include: (1) antibody testing is likely to be most useful 2 weeks…
Test Performance | Infectious Diseases | Probability/Bayes | Technology Assessment | Clinical Care | Health/Medicine -
ArticlePublication 2020Bayes' Theorem, COVID-19, and Screening Tests
This article reviews the implications of increased testing for COVID-19 using reverse transcriptase polymerase chain …
This article reviews the implications of increased testing for COVID-19 using reverse transcriptase polymerase chain reaction (rRT-PCR) through the application of Bayes’ Theorem for three hypothetical, stylized case scenarios. The scenarios involve three patients with a low, moderate, and high pre-test probability of COVID-19 infection. The category of low probability would include "asymptomatic individuals in a presumed low prevalence environment" and might vary from 10 to 20%. The category of moderate probability would include "individuals…
Test Performance | Infectious Diseases | Probability/Bayes | Clinical Care | Health/Medicine -
ArticlePublication 2020Interpreting COVID-19 Test Results: A Bayesian Approach
This article considers the following question with respect to interpreting the results of polymerase chain reaction …
This article considers the following question with respect to interpreting the results of polymerase chain reaction (PCR) assays from nasal and pharyngeal swabs for COVID-19 to inform clinical decision making: "While a positive result in an acutely ill patient is straightforward, how should physicians interpret negative tests in patients with suspected COVID-19 infection?" Using an assumption of near-perfect specificity of PCR assays for COVID-19, the authors acknowledge the uncertainty of test sensitivity. They consider two clinical scenarios…
Test Performance | Infectious Diseases | Probability/Bayes | Health/Medicine | Science/Technology | Global -
ArticlePublication 2019Cost-Effectiveness of Community-Based Childhood Obesity Prevention Interventions in Australia
This study examined the cost-effectiveness of community-based obesity prevention interventions (CBIs) consisting of strategies to …
This study examined the cost-effectiveness of community-based obesity prevention interventions (CBIs) consisting of strategies to promote healthy eating and physical activity for Australian children aged between 5-18 years. A multiple cohort Markov model that simulates diseases associated with overweight and obesity was used to estimate the health benefits, measured as health-adjusted life years (HALYs) and healthcare-related cost offsets from diseases averted due to exposure to the intervention. Health and cost outcomes were estimated over the…
Health Outcomes | Child/Nutrition | State-Transition | Cost-Effectiveness Analysis | Chronic Disease/Risk | Health Systems | Clinical Care | Food/Agriculture | Health/Medicine | Oceania -
ArticlePublication 2020Equity & Distributional Impact on Stunting of a Nutritional Package, Children Aged 6-36 Months in China: Modeling Study Findings
This article evaluates the potential impact of rolling out the Ying Yang Bao (YYB) nutritional …
This article evaluates the potential impact of rolling out the Ying Yang Bao (YYB) nutritional package on child stunting across provinces and wealth groups in China, focusing on equity. Utilizing data from the China Family Panel Studies and extended cost-effectiveness analysis methods, the study estimates the distributional impact of a 12-month YYB program for children aged 6-36 months across 25 provinces and two wealth groups. Results indicate that a 75% coverage of YYB could avert…
Health Outcomes | Child/Nutrition | Mathematical Models | Cost-Effectiveness Analysis | Health/Medicine | Asia & Pacific -
ArticlePublication 2019Systematic Review of Economic Evaluations of Vaccination Strategies Against Tuberculosis
Bacillus Calmette-Guérin (BCG) is the only licensed vaccine for tuberculosis, but its effectiveness is limited …
Bacillus Calmette-Guérin (BCG) is the only licensed vaccine for tuberculosis, but its effectiveness is limited and varies by age, so a valid cost-effectiveness study is needed to assist decision-makers in the implementation of cost-effective strategies for BCG vaccination. Using the Quality of Health Economic Studies (QHES) instrument, the authors assessed the quality of published studies involving economic evaluations of BCG vaccination strategies in a variety of regions, target populations, and vaccine types. Most of the…
Evidence Synthesis | Infectious Diseases | Mathematical Models | Cost-Effectiveness Analysis | Health/Medicine | Global -
ArticlePublication 2017Simulation of Growth Trajectories of Childhood Obesity into Adulthood
The authors developed a simulation model to estimate the risk of adult obesity at the age …
The authors developed a simulation model to estimate the risk of adult obesity at the age of 35 years for the current population of children in the United States. They used pooled height and weight data from five nationally representative longitudinal studies totaling 176,720 observations from 41,567 children and adults to simulate growth trajectories across the life course adjusted for secular trends. Using 1,000 virtual populations of 1 million children through the age of 19 years, representative of the…
Health Outcomes | Child/Nutrition | Microsimulation | Chronic Disease/Risk | Health/Medicine | North America -
ArticleWeb Portal 2017PLoS Collection: Prevention, Diagnosis and Treatment of Sexually Transmitted Infections
Globally, the World Health Organization (WHO) estimates that more than one million new sexually transmitted …
Globally, the World Health Organization (WHO) estimates that more than one million new sexually transmitted infections (STIs) occur each day, incurring a very substantial burden of morbidity, mortality and additional infections. The pathogens responsible include bacteria, parasites and viruses, and intensive research is needed to address the substantial barriers to diagnosis and treatment of STIs, and the behavioral challenges of prevention. This PLOS collection, published in collaboration with WHO, focuses on global policy and systems…
Costing Methods | Infectious Diseases | Priority Setting/Ethics | Mathematical Models | Dynamic Transmission | Cost-Effectiveness Analysis | Health Systems | Economics/Finance | Health/Medicine | Sub-Saharan Africa | Middle East & North Africa | Latin America & Caribbean | Asia & Pacific -
ArticleWeb Portal 2017PLOS Collection: Economic Efficiency of HIV Services
In order to maximize the value for money for HIV services and increase efficiency without …
In order to maximize the value for money for HIV services and increase efficiency without sacrificing quality, robust and up-to-date data on costs, efficiency and its determinants are needed. This PLOS collection, Economic Efficiency of HIV Services, presents recent, high-quality evidence from low- and middle-income countries on costs and technical efficiency of HIV services and their determinants. These data contribute to the current discussion on optimizing resources for HIV services and can provide programmatic guidance for…
Costing Methods | Infectious Diseases | Priority Setting/Ethics | Cost-Effectiveness Analysis | Operations Research | Economics/Finance | Health/Medicine | Sub-Saharan Africa | Middle East & North Africa | Latin America & Caribbean | Asia & Pacific