Table 4.

Added Value of Copy-Number Abnormalities to the Established Prognostic Model

Prognostic Variable	Multivariate Analysis (Cox model)
	Hazard Ratio	95% CI	P
Sβ2M, ≥ 5.5 mg/L	2.99	1.88 to 4.74	< .0001
t(4;14)_del(17p)	1.66	0.97 to 2.86	.066
amp(5q31.3)	0.45*	0.25 to 0.80	.0070
del(12p13.31)	2.61*	1.44 to 4.72	.0015

Abbreviation: Sβ₂M, serum β₂-microglobulin.

^*Stepwise analysis.