Grail even less accurate than previously thoughtGrail test found to have even more false positives than before. Imagine taking the test being told you have cancer and than finding out the test was only 38% accurate.
29.8% of the participants with false alarms underwent invasive procedures Sept 12, 2022
https://www.medtechdive.com/news/amid-merger-turmoil-illuminas-grail-unit-reports-downturn-in-accuracy-of/631583/
- Updated data on Grail’s multi-cancer early detection blood test Galleri suggest the diagnostic is less accurate than previously thought.
- Last year, Grail reported that 44.6% of patients with positive test results actually had cancer. In the latest analysis, the figure, known as the positive predictive value, has fallen to 38.0%.
- News of the falling predictive power seen in the study, which used an old version of Galleri, comes amid growing doubts about the fate of the Illumina-Grail merger, which the European Commission has blocked.