# News & Events

## seminar

Date/Time:
Friday, March 18, 2016 - 03:30 to 04:30
Venue:
M5
Speaker:
Buddhananda Banerjee
Affiliation:
IISER Kolkata
Title:
Linear Increment in Efficiency with the Inclusion of Surrogate Endpoint

Surrogate end-points are used when the true end-points are costly or time consuming.In a typical set up we observe a fixed proportion of true-and-surrogateresponses, and the remaining proportion are only-surrogate responses. It is obviousthat the inclusion of such only-surrogate end-points increase the efficiency ofassociated estimation. In this present paper we want to quantify the gain in efficiencyas a function of the proportion of available true responses. Also we obtain theexpression of the gain in true sample size at the expense of surrogates to achieve afixed power, as a function of the proportion of true responses. We present ourdiscussion in the two-treatment set up in the context of odds ratio.