scholarly journals An imperfect test for a virus can Be worse than No test at all

2021 ◽  
Author(s):  
Mark Whitmeyer
Keyword(s):  
Imperfect Test

scholarly journals Calibrating network analyzers with imperfect test ports

1989 ◽  
Vol 38 (4) ◽  
pp. 898-901 ◽  
Author(s):  
J.R. Juroshek ◽  
C.A. Hoer ◽  
R.F. Kaiser
Keyword(s):  
Network Analyzers ◽  
Imperfect Test

scholarly journals Substantial underestimation of SARS-CoV-2 infection in the United States due to incomplete testing and imperfect test accuracy

2020 ◽  
Author(s):  
Sean L Wu ◽  
Andrew Mertens ◽  
Yoshika S Crider ◽  
Anna Nguyen ◽  
Nolan N Pokpongkiat ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
The United States ◽  
Test Accuracy ◽  
Bias Analysis ◽  
Pandemic Response ◽  
Testing Practices ◽  
Total Burden ◽  
Response Current ◽  
The U.S ◽  
Imperfect Test

Accurate estimates of the burden of SARS-CoV-2 infection are critical to informing pandemic response. Current confirmed COVID-19 case counts in the U.S. do not capture the total burden of the pandemic because testing has been primarily restricted to individuals with moderate to severe symptoms due to limited test availability. Using a semi-Bayesian probabilistic bias analysis to account for incomplete testing and imperfect diagnostic accuracy, we estimated 6,275,072 cumulative infections compared to 721,245 confirmed cases (1.9% vs. 0.2% of the population) as of April 18, 2020. Accounting for uncertainty, the number of infections was 3 to 20 times higher than the number of confirmed cases. 86% (simulation interval: 64-99%) of this difference was due to incomplete testing, while 14% (0.3-36%) was due to imperfect test accuracy. Estimates of SARS-CoV-2 infections that transparently account for testing practices and diagnostic accuracy reveal that the pandemic is larger than confirmed case counts suggest.

Teacher as imperfect test: Reconceptualizing the referral process

1984 ◽  
Vol 19 (3) ◽  
pp. 137-148 ◽  
Author(s):  
Michael M. Gerber ◽  
Melvyn I. Semmel
Keyword(s):  
Referral Process ◽  
Imperfect Test
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