Table 4.

Cox (multivariable) analysis of characteristics affecting time to progression and overall survival

	Time to progression		Overall survival
Characteristic	P	Risk ratio	P	Risk ratio
Status at stem cell transplantation	.001	2.3	.003	2.1
t(4;14)(p16.3;q32)	.001	2.6	.006	2.2
−17p13.1 (TP53)	.08	1.9	.5	1.3
Δ13	.05	1.5	.02	1.7
Plasma cell labeling index	.01	1.2	.001	1.3
β2-microglobulin	.53	1.0	.19	1.1