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Mar 1, 2024 · A brief report published last week in the New England Journal of Medicine found that in a group of 11,297 people who tested themselves for COVID every 48 hours for 15 days, about 1.7% received at least one false-positive result on a rapid test—even though they had negative molecular tests done at the same time.
- Accuracy For People with Covid-19 Symptoms
- Accuracy For People Without Covid-19 Symptoms
- Accuracy During The First Week of Symptoms Versus The Second
- Differences Between Brands
For people with symptoms of COVID-19, the tests correctly gave a positive result an average of 72 percent of the time. The 95 percent confidence intervals were 63.7 to 79 percent, meaning that the researchers were 95 percent confident that the average fell between these two values.
The researchers found that people without COVID-19 symptoms correctly tested positive in 58.1 percent of rapid tests. The 95 percent confidence intervals were 40.2 to 74.1 percent.
Rapid tests more accurately provided a positive COVID-19 result when administered during the first week of symptoms. The researchers found that rapid tests correctly identified COVID-19 in an average of 78.3 percent of cases during the first week. In the second week, the average dropped to 51 percent.
The researchers found a large range of accuracies between manufacturers of the tests. Coris Bioconcept scored the poorest and correctly provided a positive COVID-19 result in only 34.1 percent of cases. SD Biosensor STANDARD Q had the highest score and correctly identified a positive COVID-19 result in 88.1 percent of people. In another studyTruste...
- Daniel Yetman
Oct 28, 2022 · A positive result on an at-home COVID-19 test is usually accurate, but false negatives can occur when a person has no COVID-19 symptoms or their infection happened recently. A 2021 study...
Feb 21, 2024 · Among more than 11,000 participants, 1.7% had at least one false positive rapid antigen test on the basis of RT-PCR results. Persistent false positives tended to occur in women and in persons...
Sep 22, 2023 · BinaxNOW antigen tests had a sensitivity of 92.6% for symptomatic people and 78.6% for asymptomatic people with COVID-19 in a 2021 report, per the CDC. The false positive rate on rapid antigen...
Jan 6, 2021 · For those who are not infected, 9702 will be correctly diagnosed and 198 will be false positives. The PPV is 95/95 + 198 or 32.4%. In this case, 2/3 of the positive results are false positives. For a prevalence of 0.1%, the PPV drops to 4.5%. Table.
