Table 5.

Cox regression analysis with neutropenia as dependent variable.

Variable	HR (95% CI)	p-Value
PEG-IFN-β-1a (vs sc. IFN-β-1a)	0.264 (0.078–0.889)	0.032
Treatment duration (months)	0.989 (0.955–1.025)	0.539
Age at Tx-start (years)	1 (0.955–1.025)	0.992
Number of previous therapies	0.522 (0.171–1.591)	0.253
Leukocytes baseline (leukocytes/nl)	0.712 (0.506–1.002)	0.051

Significant p values are highlighted in bold.

CI, confidence interval; HR, hazard ratio; IFN-β, interferon-beta; Tx, drug treatment.