Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Operating characteristics for the design of Example 2 for each set of curves provided in Figure 2. The panels report (1) the probability of stopping for safety in Phase I, (2) the probability of stopping for safety in Phase II, (3) the probability of stopping for futility in Phase II, and (4) the probability of completing Phase II with evidence of improved response.
