Resources Repository
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ArticlePublication 2014Rise and Fall of HIV in High-Prevalence Countries: A Challenge for Mathematical Modeling
Several countries with generalized, high-prevalence HIV epidemics, mostly in sub-Saharan Africa, have experienced rapid declines …
Several countries with generalized, high-prevalence HIV epidemics, mostly in sub-Saharan Africa, have experienced rapid declines in transmission. These HIV epidemics, often with rapid onsets, have generally been attributed to a combination of factors related to high-risk sexual behavior. The subsequent declines in these countries began prior to widespread therapy or implementation of any other major biomedical prevention. This change has been construed as evidence of behavior change, often on the basis of mathematical models, but…
Health Outcomes | Health/Medicine | Sub-Saharan Africa | Mathematical Models | Infectious Diseases -
ArticlePublication 2013Validation and Calibration of a Simulation Model of Pediatric HIV Infection
The authors developed a microsimulation model of pediatric HIV disease progression using the Cost-Effectiveness of …
The authors developed a microsimulation model of pediatric HIV disease progression using the Cost-Effectiveness of Preventing AIDS Complications (CEPAC) model framework. This CEPAC-Pediatric model was then validated by varying CD4 data and comparing the corresponding model-generated survival curves to empirical survival curves obtained from the International Epidemiologic Database to Evaluate AIDS (IeDEA). The model was calibrated to other African countries by systematically varying immunologic and HIV mortality-related input parameters. In the calibration analyses, the model-generated…
Calibration/Validation | Health/Medicine | Sub-Saharan Africa | Microsimulation | Infectious Diseases | Child/Nutrition -
ArticlePublication 2010Clinical Benefits, Costs, and Cost-Effectiveness of Neonatal Intensive Care in Mexico
This article reports on a study to estimate the clinical outcomes, costs, and cost-effectiveness of …
This article reports on a study to estimate the clinical outcomes, costs, and cost-effectiveness of neonatal intensive care in Mexico. The authors conducted a cost-effectiveness analysis using a decision analytic model of health and economic outcomes following preterm birth. Model parameters governing health outcomes were estimated from Mexican vital registration and hospital discharge databases, supplemented with meta-analyses and systematic reviews from the published literature. Costs were estimated on the basis of data provided by the…
Cost-Effectiveness Analysis | Health/Medicine | Latin America & Caribbean | State-Transition | Child/Nutrition | Health Systems | Clinical Care -
ArticlePublication 2010Cost-Effectiveness of Alternative Pregnancy Termination Strategies in Nigeria and Ghana
To explore the policy implications of increasing access to safe abortion in Nigeria and Ghana, …
To explore the policy implications of increasing access to safe abortion in Nigeria and Ghana, the authors developed a computer-based decision analytic model which simulates induced abortion and its potential complications in a cohort of women. The model was used to compare the costs and benefits of unsafe abortion and three first-trimester abortion modalities: hospital-based dilatation and curettage, hospital- and clinic-based manual vacuum aspiration (MVA), and medical abortion using misoprostol (MA). The results showed that…
Cost-Effectiveness Analysis | Health/Medicine | Sub-Saharan Africa | State-Transition | Maternal/Reproductive Health | Culture/Society | Economics/Finance -
ArticlePublication 2007Multiparameter Calibration of a Natural History Model of Cervical Cancer
This paper presents a two-step approach to model calibration of a comprehensive natural history model …
This paper presents a two-step approach to model calibration of a comprehensive natural history model of human papillomavirus (HPV) and cervical cancer. Using primary epidemiologic data from a longitudinal study of women in Brazil, a plausible range for each input parameter was identified that would produce model output within the 95% confidence intervals of the data. The authors then performed a simultaneous search over all input parameters to identify parameter sets that produced output consistent…
Calibration/Validation | Health/Medicine | Latin America & Caribbean | Mathematical Models | Microsimulation | Infectious Diseases | Chronic Disease/Risk