Table 4.

Parameter and variance estimates under a model assuming the 3 groups have non-proportional hazards (number of simulations = 300, sample size in each dataset = 1000); true β = (0.1, −0.5, 0.03)

	β̂z			β̂a			β̂za
Method	Emean	Evar	$\widehat{\mathit{\text{var}}}$	Emean	Evar	$\widehat{\mathit{\text{var}}}$	Emean	Evar	$\widehat{\mathit{\text{var}}}$
wtd PP	0.099	0.00033	0.00034	−0.56	0.034	0.035	0.036	0.00057	0.00059
PL	0.084	0.00012	0.00014	−0.83	0.035	0.040	0.072	0.00046	0.00052
FL	0.083	0.00011	0.00015	−0.87	0.042	0.030	0.074	0.00051	0.00043