Resources Repository
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ArticlePublication 2022Spatial-Mechanistic Model to Estimate Sub-National Tuberculosis Burden in Brazilian Municipalities
Reliable subnational estimates of TB incidence are needed to focus disease control resources in areas …
Reliable subnational estimates of TB incidence are needed to focus disease control resources in areas of highest need. This study developed an approach for generating small area estimates of TB incidence, and the fraction of individuals missed by routine case detection, based on available notification and mortality data. The approach is demonstrated by estimating TB outcomes for 5568 municipalities in Brazil, revealing substantial subnational differences in disease burden and other metrics useful for designing high-impact…
Mathematical Models | Health Outcomes | Infectious Diseases | Health/Medicine | Latin America & Caribbean -
ArticlePublication 2021New Microsimulation Models to Inform Cervical Cancer Control
Health decision models consider the lifetime natural history of human papillomavirus (HPV) infection and pathogenesis …
Health decision models consider the lifetime natural history of human papillomavirus (HPV) infection and pathogenesis of cervical cancer, and estimate the long-term impact of preventive interventions. We propose a new health decision modeling framework that de-emphasizes previously used cytologic-colposcopic-histologic diagnoses, which are subjective and lack reproducibility, relying instead on HPV type and duration of infection as the major determinants of model transition probabilities. We posit that new model health states and corollary transitions are universal,…
Mathematical Models | Microsimulation | Calibration/Validation | Decision Analysis | Cost-Effectiveness Analysis | Infectious Diseases | Global -
ArticlePublication 2022Early HPV Natural History Transitions
Microsimulation models used to evaluate the cost-effectiveness of novel cervical cancer screening technologies rely on …
Microsimulation models used to evaluate the cost-effectiveness of novel cervical cancer screening technologies rely on accurate transition risks for human papillomavirus (HPV) infection, persistence (or absence of HPV clearance), progression to precancerous lesions, and invasion. To inform the refinement of such models, we compared the early natural history of HPV types using prospective data from immunocompetent women in the Guanacaste Natural History Study, the ASCUS-LSIL Triage Study, and the Costa Rica HPV Vaccine Trial. We…
Mathematical Models | Microsimulation | Cost-Effectiveness Analysis | Infectious Diseases | North America | Latin America & Caribbean -
ArticlePublication 2022WHO ACTION-I Trial in Low Resource Countries
This study evaluated the cost-effectiveness of dexamethasone administration in dexamethasone in pregnant women at risk …
This study evaluated the cost-effectiveness of dexamethasone administration in dexamethasone in pregnant women at risk of early preterm birth using data from a multicentre, randomized, placebo-controlled trial in Bangladesh, India, Kenya, Nigeria, and Pakistan. Primary cost data were collected in 28 hospitals across the 5 countries. A decision tree model was used to compare dexamethasone treatment to no intervention from a health-care sector perspective. Administration of dexamethasone averted 38 neonatal deaths per 1000 woman–baby units…
Mathematical Models | Health Outcomes | Cost-Effectiveness Analysis | Maternal/Reproductive Health | Child/Nutrition | Clinical Care | Global | Sub-Saharan Africa | Asia & Pacific -
ArticlePublication 2019Projected U.S. State-Level Prevalence of Adult Obesity and Severe Obesity
This analysis estimates state-specific and demographic subgroup-specific trends and projections of the prevalence of categories …
This analysis estimates state-specific and demographic subgroup-specific trends and projections of the prevalence of categories of body-mass index (BMI) in the United States. Self-reported BMI from the Behavioral Risk Factor Surveillance System Survey (1993-1994 and 1999-2016) were obtained and corrected for quantile-specific self-reporting bias. Multinomial regressions were then fitted for each state and subgroup to estimate the prevalence of four BMI categories from 1990 through 2030: underweight or normal weight (BMI <25), overweight (25 to…
Mathematical Models | Health Outcomes | Calibration/Validation | Chronic Disease/Risk | Social Determinants | North America -
ArticlePublication 2021BMI-Related Healthcare Costs in the U.S.
This paper estimates continuous body mass index (BMI) related health care expenditures using data from …
This paper estimates continuous body mass index (BMI) related health care expenditures using data from the Medical Expenditure Panel Survey (MEPS) 2011-2016, adjusting BMI for self-report bias and controlling for potential confounding between BMI and medical expenditures. Costs are reported in $US 2019. The analysis found a J-shaped curve of medical expenditures by BMI, with higher costs for females and the lowest expenditures occurring at a BMI of 20.5 for adult females and 23.5 for…
Costing Methods | Child/Nutrition | Chronic Disease/Risk | North America -
ArticlePublication 2014Step-by-Step Guideline for Disease-Specific Costing Studies in LMIC
Disease-specific costing studies can be used as input into cost-effectiveness analyses and provide important information …
Disease-specific costing studies can be used as input into cost-effectiveness analyses and provide important information for efficient resource allocation. This paper provides a step-by-step guideline for conducting disease-specific costing studies in LMICs where data availability is limited and illustrates how the guideline was applied in a costing study of cardiovascular disease prevention care in rural Nigeria. The step-by-step guideline provides practical recommendations on methods and data requirements for six sequential steps: 1) definition of the study…
Costing Methods | Chronic Disease/Risk | Health Systems | Health/Medicine | Sub-Saharan Africa -
ArticlePublication 2022Healthcare Cost of Overweight & Obesity in South Africa
This analysis estimates the healthcare cost associated with treatment of weight-related conditions from the perspective …
This analysis estimates the healthcare cost associated with treatment of weight-related conditions from the perspective of the South African public sector payer. The authors report that the total cost of overweight and obesity is estimated to be ZAR33,194 million in 2020, representing approximately 15% of government health expenditure and equivalent to 0.67% of GDP. This analysis is an example of a bottom-up gross costing approach. The study draws South African data from multiple sources to estimate…
Costing Methods | Cost-Effectiveness Analysis | Chronic Disease/Risk | Health Systems | Health/Medicine | Sub-Saharan Africa -
ArticlePublication 2022Cost-Effectiveness & Value-of-Information Analysis Using Machine Learning-Based Metamodeling: A Case of Hepatitis C Treatment
This study compares machine learning (ML)-based metamodels with conventional metamodeling approaches in replicating the outcomes …
This study compares machine learning (ML)-based metamodels with conventional metamodeling approaches in replicating the outcomes of a complex simulation model of hepatitis C virus (HCV) natural history. Three ML-based metamodels (random forest, support vector regression, and artificial neural networks) and a linear regression-based metamodel were developed from the simulation model's 40 input parameters. Performance evaluation included root mean squared error (RMSE) and Pearson's R2 on normalized data. ML-based metamodels generally outperformed linear regression, with random…
Mathematical Models | Infectious Diseases | Chronic Disease/Risk | Health/Medicine