. Author manuscript; available in PMC: 2011 Dec 6.

Published in final edited form as: Stat Biosci. 2010 Dec;2(2):154–179. doi: 10.1007/s12561-010-9026-x

Table 4.

Data analysis results using proposed model

Parameter	Estimate	SE_J	P-value	SE_S	Naive SE
Treament Only Model
Correlation	0.173	0.159	0.279	-	-
Increased Strength	−0.430	0.231	0.063	0.225	0.247
Increased Duration	0.419	0.231	0.070	0.226	0.245
Larger Model
Correlation	0.207	0.200	0.300	-	-
Increased Strength	−0.249	0.482	0.605	0.440	0.374
Increased Duration	0.551	0.387	0.154	0.360	0.326
Interaction	−0.321	0.704	0.648	0.646	0.498
Age
1–9	(ref)
10–15	0.353	0.234	0.132	0.227	0.256
16+	0.485	0.739	0.512	0.565	0.451
Platelets (×10³/mm²)
1–49	(ref)
50–150	0.397	0.305	0.193	0.290	0.258
150+	−0.145	0.651	0.824	0.574	0.528

Estimate = log hazard ratios and estimates of σ

SE_J = jackknife based standard errors

P-value = two-sided p-value using SE_J

SE_S = sandwich-formula based standard errors (only for β)

Naive SE = SE assuming independence (only for β)