Table 5.

Multivariate analysis of prognostic factors

Variable	Death		Any event		Relapse		Death in CR
	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P
WBC at presentation	1.004 (1.002-1.005)	< .001	1.003 (1.001-1.004)	< .001	1.004 (1.002-1.006)	.001		NS
Age	1.02 (1.007-1.034)	.002	1.013 (1.000-1.025)	.04		NS	1.032 (1.005-1.061)	.02
Extra Ph chromosome [+der(22)]		NS		NS	0.569 (0.342-0.946)	.03		NS
del(9p)		NS		NS	1.742 (1.036-2.928)	.04		NS

HR greater than 1 (unity) indicates increased risk of the event in relationship to the characteristic studied.

HR indicates hazard ratio; CI, confidence interval; and NS, not significant.