Table 2.

Coefficient estimates for regularized Gehan and rank-based partial linear model through bivariate stratification. Table entries are multiplied by 1000

Term	Gehan		2-way stratification (Kn tumor size, Kn lymph nodes)
	w/o Zi	w/Zi	(2,2)	(2,3)	(2,4)	(3,2)	(3,3)	(3,4)	(4,2)	(4,3)
Tsize		− 69
Lnode		− 240
Mean_symmetry	180	172	6	341	175	31	300	466	31	345
Mean_fractaldim	8	30	86	50	0	27	213	182	81	16
SE_texture	0	0	0	0	0	0	0	58	0	0
SE_perimeter	0	0	0	0	0	0	0	− 114	0	0
SE_compactness	0	0	0	0	0	0	0	− 29	0	0
SE_symmetry	0	0	0	0	0	0	− 61	− 96	0	0
Worst_radius	0	− 72	0	0	0	0	0	0	0	0
Worst_texture	0	0	0	0	0	0	0	34	0	0
Worst_perimeter	− 603	− 426	− 291	− 390	− 433	− 296	− 393	− 449	− 272	− 373
Worst_smoothness	0	0	0	− 84	− 72	0	− 327	− 489	0	− 80
Worst_concavity	0	0	0	0	− 8	0	0	− 42	0	0