Table 3.

Contribution of Sβ₂M to the Copy-Number Abnormalities Model

Prognostic Variable	Multivariate Analysis (stepwise Cox model)
	Hazard Ratio	95% CI	P
Sβ2M, ≥ 5.5 v < 5.5 mg/L	2.78	1.78 to 4.35	< .0001
amp(5q31.3), yes v no	0.37	0.21 to 0.64	.0005
del(12p13.31), yes v no	3.17	1.81 to 5.56	< .0001

Abbreviation: Sβ₂M, serum β₂-microglobulin.