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ThisIsMS.com :: View topic - Campath Phase II results
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Campath Phase II results
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gkalman
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Joined: Jun 02, 2005
Posts: 41

PostPosted: Mon May 07, 2007 5:26 am    Post subject: Reply with quote

Finn and CureOrBust,

It seems to me that we are solving for very different numbers. One is the cumulative effect of the compounds, the second is the relative effect of Campath alone.

I agree that one cannot come up with a number of Campath acting alone. I.e., it was not tested this way.

The only way to support finn’s calculation, would be to assume independence of effects of the two targets. However, there, one would need to start with a cumulative effectiveness for both, not the relative effectiveness of both vs’ Rebif alone. I.e., if we know that the first target is 30% effective and the second is 80% or 88% effective with respect to the first alone. (See CureOrBusts calc, as I see it as more explanatory than mine.) Then, we can come up with the cumulative number.

Finally, assuming independence and now using the cumulative effectiveness, one can use finn’s calculation to attempt to estimate effectiveness of Campath alone.
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finn
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Joined: Mar 18, 2004
Posts: 288
Location: Finland

PostPosted: Mon May 07, 2007 10:48 am    Post subject: Reply with quote

gkalman wrote:
Finally, assuming independence and now using the cumulative effectiveness, one can use finn’s calculation to attempt to estimate effectiveness of Campath alone.
Well, like you wrote, we just can't calculate the absolute effectiveness of Campath with the limited amount of information given in the article. All we can do is assume, really.

-finn
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gkalman
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PostPosted: Mon May 07, 2007 4:15 pm    Post subject: Reply with quote

Agreed, just wanted to point out for the less statistically minded, the concept of looking for effectiveness of Campath alone cannot be solved for without extra assumptions.

On Bob's original question about effectiveness of the combination, I don't believe there is any disagreement. It does look to be quite high.
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