Table 4.

The maximum likelihood estimates (MLE), standard errors (SE), p-values, and 95% confidence interval (CI) of the parameters from the proposed joint model.

	MLE	SE	P	95% CI
For the probability of IBRT being NP
intercept	4.298	2.511	0.087	[−0.626, 9.222]
Age	−0.006	0.031	0.855	[−0.066, 0.055]
Distant	−4.435	1.695	0.009	[−7.758, −1.111]
Stage	−0.730	0.898	0.417	[−2.490, 1.031]
p	0.648	0.079		[0.494, 0.802]
q	0.873	0.059		[0.757, 0.988]
For the time to IBTR
Age	−0.053	0.006	< 0.001	[−0.065, −0.041]
Stage	−0.015	0.171	0.928	[−0.350, 0.319]
ζ	1.826	0.350	< 0.001	[1.140, 2.511]
For the time to breast cancer death
Age	−0.027	0.006	< 0.001	[−0.039, −0.015]
Stage	1.088	0.149	< 0.001	[0.796, 1.380]
γ	0.532	0.144	< 0.001	[0.249, 0.815]
${\sigma }_u^2$	1.592	0.433