λ0(t) ≡ λ0   θ Cens. %             t1 : S(t1) = 0.75             t2 : S(t2) = 0.5
Gamma Frailty Ignoring Frailty Gamma Frailty Ignoring Frailty
Bias SE Bias SE Bias SE Bias SE
0.01 1.64 10% .0089 .0092 .0251 .0148 .0054 .0043 .0250 .0119
0.01 1.64 30% .0087 .0094 .0131 .0150 .0055 .0044 .0339 .0116
0.01 0.5 10% .0075 .0116 .0219 .0145 .0103 .0064 .0077 .0096
0.01 0.5 30% .0075 .0126 .0140 .0153 .0099 .0071 .0125 .0102
0.1 1.64 10% .0086 .0093 .0249 .0148 .0052 .0044 .0249 .0117
0.1 1.64 30% .0086 .0097 .0119 .0153 .0054 .0045 .0346 .0123
0.1 0.5 10% .0076 .0118 .0223 .0148 .0098 .0066 .0079 .0095
0.1 0.5 30% .0075 .0129 .0141 .0158 .0094 .0067 .0134 .0097
1.0 1.64 10% .0091 .0095 .0249 .0143 .0054 .0043 .0245 .0118
1.0 1.64 30% .0092 .0098 .0122 .0158 .0052 .0047 .0354 .0122
1.0 0.5 10% .0075 .0118 .0221 .0152 .0101 .0064 .0077 .0097
1.0 0.5 30% .0076 .0129 .0144 .0152 .0099 .0067 .0130 .0098
Table 2: Estimation of attributable fractions in simulated clustered survival data: β = log(2).