Many years ago on ch.com before this new message board there was a bar graph/pie chart/etc displaying preventative and abortive medications that have been used; both successfully and unsuccessfully. 

I have not been to this website in a few years and was searching for these pie charts/graphs/etc and can no longer find them. 

Can somebody point me in the right direction of locating these studies?   

Hit the "cluster survey" link on the left. Then hit survey results.

Might show what your looking for.

That is exactly what I was looking for, thanks for your reply. 

The statistical info remains basically the same as it did 5 yrs ago, with additional surveys rendered. 

I wonder if this info is updated in realtime or how often!?

Results from the Cluster Headache Survey that completed in December of 2008 are consistent with the results of the ongoing survey...  The coefficient of correlation between the two surveys was 95%...  In other words, very strong statistically.  See the following link:

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There were some surprises like there are more CH'ers using oxygen therapy than imitrex injections...  And, for the CH'ers actively using oxygen therapy as an abortive, the success rate (efficacy) is now greater than 70% and growing...

Take care,

V/R, Batch