Table IV. Multivariable Analysis of Serum Vitamin D with Vitamin D Supplementation.

	Effect (ng/ml 25-hydroxyvitamin D)	CI	p-value
Reference*	17.28	9.23 to 25.63
Categorical variables
HCT vs. conventional chemotherapy	0.61	-3.44 to 4.65	0.77
Male vs. female	2.45	-1.39 to 6.30	0.21
Not Caucasian vs. Caucasian	-1.82	-6.36 to 2.71	0.42
Oral Vitamin D supplementation vs. none	5.33	0.89 to 9.76	0.02
Continuous variables
Age older than 8 years (1 yr increase)	-0.75	-1.37 to -0.14	0.02
Years from diagnosis	0.55	-0.01 to 1.11	0.05
BMI z-score	-0.39	-2.38 to 1.60	0.70
UV30	1.04	0.26 to 1.82	0.01
100 IU Vitamin D Intake	0.90	0.01 to 1.78	0.05

^*patient who received chemotherapy, female, Caucasian, age=8 years, years from diagnosis=1, BMI z-score=0, UV30=0, vitamin D intake=0, no vitamin D supplements; Adjusted R²=0.253