SF = 1  SF = 2  SF = 4  SF = 10
Raised-risk area  θ = 1.5  θ = 2  θ = 3  θ = 1.5  θ = 2  θ = 3  θ = 1.5  θ = 2  θ = 3  θ = 1.5  θ = 2  θ = 3
Simu 1
 10% area (E = 0.84)  1.00  1.01  1.02  1.00  1.02  1.27  1.00  1.01  1.53  1.01  1.10  2.50
 25% area (E = 1.10)  1.00  1.02  1.09  1.00  1.01  1.17  1.00  1.05  1.80  1.01  1.22  2.67
 50% area (E = 1.92)  1.00  1.02  1.25  1.00  1.04  1.88  1.00  1.23  2.78  1.02  1.72  3.02
 75% area (E = 5.37)  1.00  1.03  1.57  1.00  1.07  2.44  1.01  1.42  2.91  1.04  1.87  3.02
 90% area (E = 7.38)  1.00  1.03  1.60  1.01  1.09  2.46  1.01  1.49  2.91  1.06  1.89  3.02
Simu 2
 1% cluster (Ē = 5.42)  1.02  1.06  1.98  1.01  1.25  2.66  1.03  1.72  2.92  1.21  1.92  2.98
Simu 3  θ* = 1.35  θ* = 1.65  θ* = 2.1  θ* = 1.35  θ* = 1.65  θ* = 2.1  θ* = 1.35  θ* = 1.65  θ* = 2.1  θ* = 1.35  θ* = 1.65  θ* = 2.1
 20 × 1% clusters (Ē range: 0.77–11.6)  1.02  1.19  1.55  1.05  1.31  1.64  1.12  1.44  1.81  1.31  1.55  2.06