Table 5.

Simulation results for stratified case-cohort designs; Bias: average bias of the estimates; Var: average variances of the estimates; Est Var: averages of the resampled variance estimates; ECP: empirical coverage probabilities of the 95% Wald-type confidence intervals; MSE: mean squared error of the estimates.

τ	Estimators	Subcohort size: 200					Subcohort size: 400
		Bias	SE	SEE	ECP	MSE	Bias	SE	SEE	ECP	MSE
0.25	β̂(0)(τ)	0.071	0.131	0.137	0.940	0.031	0.047	0.096	0.122	0.980	0.011
	β̂(1)(τ)	0.058	0.103	0.096	0.950	0.014	0.057	0.070	0.082	0.949	0.008
	β̂(2)(τ)	−0.058	0.142	0.140	0.940	0.024	−0.063	0.090	0.108	0.934	0.012
	β̂(0)(τ)eff	0.014	0.030	0.042	0.980	0.001	0.018	0.034	0.036	0.938	0.001
	β̂(1)(τ)eff	−0.027	0.095	0.084	0.940	0.010	0.003	0.082	0.064	0.934	0.007
	β̂(2)(τ)eff	−0.003	0.128	0.102	0.944	0.016	−0.008	0.072	0.105	0.970	0.005
	β̂(0)(τ)Naive	−0.193	0.069	0.180	0.980	0.042	−0.202	0.054	0.133	0.794	0.044
	β̂(1)(τ)Naive	−0.073	0.060	0.125	0.986	0.009	−0.080	0.047	0.094	0.932	0.009
	β̂(2)(τ)Naive	0.086	0.094	0.133	0.974	0.016	0.087	0.074	0.100	0.932	0.013
0.50	β̂(0)(τ)	0.027	0.115	0.115	0.964	0.014	0.053	0.107	0.127	0.948	0.014
	β̂(1)(τ)	0.006	0.082	0.088	0.984	0.007	0.018	0.068	0.077	0.974	0.005
	β̂(2)(τ)	0.000	0.154	0.148	0.960	0.024	−0.013	0.105	0.117	0.970	0.011
	β̂(0)(τ)eff	0.004	0.030	0.044	0.964	0.001	0.011	0.031	0.035	0.950	0.001
	β̂(1)(τ)eff	−0.004	0.098	0.081	0.972	0.010	0.018	0.080	0.063	0.924	0.007
	β̂(2)(τ)eff	−0.014	0.085	0.103	0.964	0.007	0.001	0.077	0.103	0.976	0.006
	β̂(0)(τ)Naive	−0.194	0.102	0.120	0.696	0.048	−0.220	0.072	0.095	0.222	0.054
	β̂(1)(τ)Naive	−0.071	0.078	0.083	0.930	0.011	−0.087	0.055	0.067	0.772	0.011
	β̂(2)(τ)Naive	0.082	0.100	0.105	0.888	0.017	0.092	0.077	0.082	0.792	0.015