. Author manuscript; available in PMC: 2012 Mar 1.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2010 Apr 17;79(3):800–807. doi: 10.1016/j.ijrobp.2009.11.010

Table 5.

Univariate analysis of factors associated with log(WBC nadir) in the combined cohort

	log(WBC Nadir) (k/μL)
	β	95% CI	p
V₁₀	−0.028	−0.05, −0.008	0.006^*
V₂₀	−0.023	−0.04, −0.01	<0.001^*
V₃₀	−0.012	−0.02, −0.0004	0.043^*
V₄₀	−0.010	−0.02, 0.001	0.067
Mean Pelvic Bone Marrow Dose	−0.037	−0.07, −0.004	0.028^*
log(BMI)	0.555	0.17, 0.94	0.005^*
Age	0.002	−0.004, 0.01	0.494
Black Race	−0.019	−0.22, 0.18	0.853
Stage	−0.19	−0.38, 0.005	0.056
Comorbidity	−0.037	−0.24, 0.16	0.715

CI: confidence interval; WBC: white blood cell count; β: regression coefficient (e.g., 1% increase in V₂₀ corresponds to a reduction in log(WBC nadir) of 0.023 k/μL); BMI: body mass index.

statistically significant