Biotech Values

[iwfal]

(i'm not that familiar with rcc or onc area in general so please correct me, but my understanding is they likely need good PFS data to make it attractive to a partner as RR alone doesn't mean much - and I'm not sure just how much RR correlates to PFS in this indication)

The general rule I use is that the closer in time the two measurements the more correlation between them:

a) A disease with an average time to progression of 3 or 4 months - then response rate probably has a high correlation. See, for example: http://content.nejm.org/cgi/content/abstract/351/4/337

b) A disease with an average time to progression of 18 months - I'd suspect a weaker correlation to RR.

Note that IMO survival suffers from 2 weakenings of the correlation to RR - 1) death is further separated in time from Response than is progression, 2) death is a different kind of endpoint.

Given that rcc median pfs times are on the order of 3 to 6 months I'd expect a fairly strong correlation between rr and pfs. FWIW.