From "What Is the Chance That This Study Is Clinically Significant?" Effective Clinical Practice, September/October 1999. 2:234-239.
Figure 1. Q value for the trial of cyclosporine in patients with severe rheumatoid arthritis. The curve for probability density is centered on the measured effect, and the 95% CI is superimposed on the horizontal axis. The Q value is the area under the curve to the right of the minimum worthwhile effect.>