12/n Again, this is not a minor point - masks may indeed not reduce infection numbers much during lockdown, but that doesn't say a lot about their effectiveness at other times
I'm still not excluding the pre test people tho, this is just the numbers from the main analysis
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Me neither in the numbers above. Take mask group. AB confirmed 37 out of 2383 = 1.55%. Rogan-Gladen correction with specificity 99.2% and sensitivity 90.2%: (1.55%+99.2%-1)/(99.2%+90.2%-1) = 0.75%/89.4% = 0.84%
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Yep but I'm using the internal validation numbers for sens/spec rather than the manufacturer numbers, so 82.5% and 99.5%
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