Resources Repository
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ArticlePublication 2020Variation in False-Negative Rate of Reverse Transcriptase Polymerase Chain Reaction-Based SARS-CoV-2 Tests by Time Since Exposure
This study aimed to determine the false-negative rate of RT-PCR tests for SARS-CoV-2 infection based …
This study aimed to determine the false-negative rate of RT-PCR tests for SARS-CoV-2 infection based on the timeline of exposure and symptom onset. Drawing from data in seven studies involving 1,330 upper respiratory tract samples, a Bayesian model was used to estimate these rates. Findings showed that in the initial four days prior to typical symptom onset, the false-negative rate decreased from 100% on day 1 to 67% on day 4. By the day of…
Clinical Care | Test Performance | Infectious Diseases | Health/Medicine | Science/Technology | North America -
ReviewPublication 2021Considerations for Diagnostic COVID-19 Tests
During the initial stages of the COVID-19 pandemic, there was a rush by numerous diagnostic …
During the initial stages of the COVID-19 pandemic, there was a rush by numerous diagnostic test manufacturers to create, validate, and implement testing methods. This review discusses the pivotal role of diagnostic tests during the pandemic's first global wave, highlighting the challenges in technology and implementation experienced early on. The study also offers insights for enhancing the use of diagnostics, especially syndromic ones, should there be future spikes or regional outbreaks of COVID-19. The overarching…
Clinical Care | Test Performance | Infectious Diseases | Health/Medicine | Science/Technology | North America -
ArticlePublication 2022Estimated Transmission Outcomes and Costs of SARS-CoV-2 Diagnostic Testing, Screening, and Surveillance Strategies Among a Simulated Population of Primary School Students
In the wake of the COVID-19 pandemic's significant educational disruptions, the U.S. government allocated $10 …
In the wake of the COVID-19 pandemic's significant educational disruptions, the U.S. government allocated $10 billion in March 2021 for testing in schools. The study aimed to analyze the costs and benefits of different COVID-19 testing strategies, particularly focusing on full-time, in-person elementary and middle school education. Utilizing an updated agent-based network model, the study simulated transmission scenarios in schools, considering various testing strategies ranging from diagnostic testing (test-to-stay) to reduce symptom-based isolations, routine screening…
Clinical Care | Test Performance | Mathematical Models | Cost-Effectiveness Analysis | Infectious Diseases | Health/Medicine | Science/Technology | North America -
ReviewPublication 2022Rapid, Point-of-Care Antigen Tests for Diagnosis of SARS-CoV-2 Infection
This study reviewed the diagnostic accuracy of rapid, point-of-care antigen tests for detecting SARS-CoV-2 infection, …
This study reviewed the diagnostic accuracy of rapid, point-of-care antigen tests for detecting SARS-CoV-2 infection, differentiating results between symptomatic and asymptomatic individuals. Using data from 155 study cohorts, the study found that the sensitivity of antigen tests was generally higher for symptomatic individuals, especially during the first week after symptom onset, due to higher viral loads. For example, average sensitivity was higher in symptomatic (73.0%) compared to asymptomatic participants (54.7). Average sensitivity was higher in…
Clinical Care | Test Performance | Infectious Diseases | Health/Medicine | Science/Technology | North America -
ToolWeb Portal 2023CDC Resource Portal: Diagnostic Tests for SARS-CoV-2
The Centers for Disease Control and Prevention (CDC) provides a broad range of resources about …
The Centers for Disease Control and Prevention (CDC) provides a broad range of resources about diagnostic tests for SARS-CoV-2 aimed at the general public, health professionals and laboratory personnel. The overviews and guidelines for health professionals provide comprehensive information about the current available diagnostics, their strengths and limitations, their performance characteristics and guidelines for their use and interpretation. Selected topics included are provided below. Overview of Testing for SARS-CoV-2, the Virus That Causes COVID-19. Interim…
Clinical Care | Test Performance | Infectious Diseases | Health/Medicine | Science/Technology | North America -
ArticlePublication 2022Comparison of Home Antigen Testing With RT-PCR and Viral Culture During the Course of SARS-CoV-2 Infection
As the availability of at-home self-collected antigen tests for SARS-CoV-2 increases, understanding their efficacy is …
As the availability of at-home self-collected antigen tests for SARS-CoV-2 increases, understanding their efficacy is crucial. A study in San Diego and Denver between January and May 2021 assessed the reliability of these tests against standard RT-PCR tests and viral cultures. Of the 225 participants with confirmed infections, the antigen test sensitivity was found to be 50% during the infectious period, 64% against the same-day RT-PCR, and 84% against the same-day cultures. Sensitivity was highest…
Clinical Care | Test Performance | Infectious Diseases | Culture/Society | Health/Medicine | Science/Technology -
ArticlePublication 2023Estimated Travel Time & Staffing Constraints to Accessing the Ethiopian Healthcare System: Two-Step Floating Catchment Area Analysis
This study investigates disparities in health care access across different income levels and geographic locations …
This study investigates disparities in health care access across different income levels and geographic locations in Ethiopia. Employing a two-step floating catchment area method, the research estimates variations in spatial access to health care and staffing levels at facilities. Average travel time from population centers is calculated and adjusted with provider-to-population ratios. Spearman's rank tests are applied to test hypotheses about the roles of travel time versus staffing in access variations. Results reveal regional disparities,…
Health Systems | Health/Medicine | Sub-Saharan Africa -
ArticlePublication 2022Conceptualizing Monetary Benchmarks for Health Investments toward Poverty Reduction
Public spending can improve population well-being, for example, by averting or reducing poverty. This article …
Public spending can improve population well-being, for example, by averting or reducing poverty. This article aims to conceptualize monetary benchmarks for health sector investments oriented towards poverty alleviation in low- and lower-middle-income countries. Priority setting in low- and lower-middle-income countries could be informed by health-sector PRBs (poverty reduction benchmarks), in addition to burden of disease and cost-effectiveness considerations. The computed PRBs, expressed in dollars per poverty case averted, can possibly be viewed in a manner…
Health Systems | Priority Setting/Ethics | Evidence Synthesis | Social Determinants | Economics/Finance | Health/Medicine | Global -
ArticlePublication 2022Economic Evaluations of Health System Strengthening Activities
Health system strengthening (HSS) activities should accompany disease-targeting interventions in low/middle-income countries (LMICs). Economic evaluations …
Health system strengthening (HSS) activities should accompany disease-targeting interventions in low/middle-income countries (LMICs). Economic evaluations provide information on how these types of investment might best be balanced but can be challenging. This paper conducted a systematic review to evaluate how researchers address these economic evaluation challenges. The authors searches produced 1978 studies, out of which they included 36. Most studies used data from prospective trials and calculated cost-effectiveness directly from these trial inputs, rather than…
Health Systems | Cost-Effectiveness Analysis | Policy/Regulation | Economics/Finance | Health/Medicine | Global