. Author manuscript; available in PMC: 2014 Jan 15.

Published in final edited form as: Biometrika. 2013 May 14;100(3):741–755. doi: 10.1093/biomet/ast012

Table 4.

Analysis results for diabetes data.

	NPMLE_g			NPMLE_l			GehanR
	Est.	SE	pv	Est.	SE	pv	Est.	SE	pv
treatment	−0.929	.104	.000	−0.949	.105	.000	−0.981	.201	.000
age	0.011	.006	.078	0.008	.006	.162	0.010	.016	.551
type	−0.029	.102	.779	0.070	.096	.467	−0.301	.453	.506
risk	1.660	.353	.000	1.491	.346	.000	2.568	1.036	.013

^†

NPMLE_g, nonparametric maximum likelihood estimator with the gamma frailty; NPMLE_l, nonparametric maximum likelihood estimator with the log-normal frailty; GehanR, Gehan rank estimator; Est., estimated coefficients; pv, p-value; age, age at diagnosis of diabetes; type, type of diabetes; risk, risk group.