AI
Wednesday, October 27, 2010 4:34:59 PM
Before we can make even loose assertions about the market impact of a JC test, we need to have some idea of the sensitivity and specificity of the test.
My statement was predicated upon there being an approved test* and that ~50% of them test positive.
My conclusion was that a lot of those who test positive will drop Tysabri.
So for now, I will stick to my loose assertion.
No doubt, I have more at stake here than logic.
ij
* Perhaps this is where you think I err, but I would expect the test have high sensitivity and specificity, say over 90%.
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