. Author manuscript; available in PMC: 2016 Jan 20.

Published in final edited form as: Comput Stat Data Anal. 2013 Nov;67:199–212. doi: 10.1016/j.csda.2013.05.011

Table 3. Linear model: results of parameter estimates using Cox PH model and the proposed model.

	α₁					α₂					angle (β̂,β₀)

	bias	SD	SEE	CP	RE	bias	SD	SEE	CP	RE	mean	SD
N = 1000, censoring rate = 80%, 200 cases

Cox PH	0.034	0.154	0.150	0.962	NA	-0.072	0.274	0.263	0.952	NA	4.780	2.650
plSI	0.069	0.168	0.157	0.956	0.907	-0.144	0.298	0.278	0.954	0.898	5.150	2.820

N = 2000, censoring rate = 80%, 400 cases

Cox PH	0.019	0.101	0.103	0.958	NA	-0.041	0.179	0.181	0.956	NA	3.213	1.665
plSI	0.034	0.105	0.105	0.952	0.958	-0.072	0.186	0.185	0.956	0.955	3.320	1.700

bias: empirical bias; SD: sample standard deviation; SEE: standard error estimate; CP: empirical coverage probability of 95% confidence interval; RE: relative efficiency; N: cohort size; plSI: partially linear single index model.