Figure 2.

Median sensitivity and specificity for true cluster relative risk varied from 1 to 5. The vertical line is at a true relative risk of 1.7. As in Figure 1, two cluster shapes and two scanning window shapes were used for each simulation scenario. The simulation method was the same as for Figure 1, except that the maximum population per unit was held at 1,000 and the true relative risk was varied from 1 to 5 in 0.1 increments.