Table 3.

Multivariate analyses for PFS^*

Variables:	N	Relative Risk of relapse/progression or death (95% CI)	P-value
Main effect:
No rituximab	812	1.00
Rituximab	174	0.64 (0.50 – 0.81)	<0.001
Other significant covariates:
Age at transplant, years
<55	562	1.00
≥ 55	424	1.45 (1.23 – 1.71)	<0.001
Disease status at transplant
(1) CR1	167	1.00	<0.001a
(2) PIF-sensitive	182	1.24 (0.91 – 1.69)	0.18
(3) PIF-resistant	54	3.38 (2.30 – 4.96)	<0.001
(4) REL-sensitive	298	2.02 (1.53 – 2.67)	<0.001
(5) REL-resistant	69	2.65 (1.83 – 3.82)	<0.001
(6) CR2+	158	1.57 (1.14 – 2.14)	0.010
(7) Unknown	58	2.13 (1.45 – 3.15)	0.001
Number of lines of chemotherapy
≤2	561	1.00	<0.001b
>2	418	1.61 (1.36 – 1.91)	<0.001

Abbreviations: CI = confidence interval.

^*Cox models stratified on karnofsky performance score

^aSix degrees of freedom

^bTwo degrees of freedom