Stanford reports doing a 30-person validation test with pre-COVID-19 hip surgery patients (100% negative). But this is not enough to validate these population-scale tests, especially when 98.5% specificity (rather than 99.5%) would fully invalidate the headline result.
> Stanford reports doing a 30-person validation test with pre-COVID-19 hip surgery patients (100% negative)
Hmm - I guess I should now go to the source - but from the other link: " test validation included a total of 30+371 pre-covid blood tests, and only 399 of them came back negative." https://statmodeling.stat.columbia.edu/2020/04/19/fatal-flaw... - I think I trust it more
http://img.bj.wezhan.cn/content/sitefiles/2005911/images/132...
Stanford reports doing a 30-person validation test with pre-COVID-19 hip surgery patients (100% negative). But this is not enough to validate these population-scale tests, especially when 98.5% specificity (rather than 99.5%) would fully invalidate the headline result.