False negative rateBackground COVID-19 is diagnosed via detection of SARS-CoV-2 RNA using real time reverse-transcriptase polymerase chain reaction (rtRT-PCR). Performance of many SARS-CoV-2 rtRT-PCR assays is not entirely known due to the lack of a gold standard. We sought to evaluate ...
False negative rate of COVID-19 is eliminated by using nasal swab testdoi:10.1016/j.tmaid.2020.101668Chaojun XieJianyun LuDi WuLin ZhangZhicong YangTravel Medicine and Infectious Disease
Post-test clinical evaluation of each patient is advised to ensure that rtRT-PCR results are not the only factor in excluding COVID-19. 展开 关键词: SARS-CoV-2 COVID-19 Discordant testing False negative rate DOI: 10.1186/s12985-021-01489-0 ...
Reverse Transcription-Polymerase Chain Reaction (RT-PCR) is the gold-standard test for the diagnosis of COVID-19. However, the RT-PCR test suffers from high false-negative rates and delayed results. Medical imaging, particularly Computed Tomography (CT) scans, has been recommended by the World ...
The PerkinElmer test used at the state lab is themost sensitive PCR test on the market. Valencia Lab Positivity Rate 60% Higher Than CA Positivity Rate Since it opened in November, the state lab's positivity rate has been consistently higher than California's positivity rate overall. ...
Testing for COVID-19 has been unable to keep up with the demand. Further, the false negative rate is projected to be as high as 30% and test results can take some time to obtain. X-ray machines are widely available and provide images for diagnosis quickly. This paper explores how useful...
The fraction of individuals within a population who are affected. This value can indicate the a priori probability that a randomly selected individual from a given population is infected, and is a key determinant of the utility of a screening test. ...
At the beginning of the pandemic, Chinese clinical centers had insufficient test kits, which are also producing a high rate of false-negative results, so doctors are encouraged to make a diagnosis only based on clinical and chest CT results [12,14]. CT is widely used for COVID-19 detection...
The novel coronavirus SARS2-CoV-2 has precipitated the present outbreak of COVID-19, a highly infectious respiratory disease, for which there is presently no effective treatment. The resulting pandemic is having profound and likely long-lasting effects on communities, economies and individuals’ lived...
13, Fig. 14, the DCELM-ChOA has a higher area under the precision-recall curves; it thus means a lower false positive and false negative rate than other benchmark detectors. The results of the simulation indicate that DCELM-ChOA represents the best accuracy for all epochs. As shown from ...