Table 1:

Patient characteristics

Characteristics	Infusions, No.	Infusions With At Least 1 Event	% of Infusions With At Least 1 Event	Odds Ratio	P Value^{^a}
Age
<70 yrs	634	67	10.6	Reference	.91
>70 yrs	37	4	10.8	1.06 (0.37, 3.02)
Race
White	645	68	10.5	Reference	.87
Non-white	26	3	11.5	1.10 (0.35, 3.50)
Gender
Female	272	33	12.1	Reference	.38
Male	399	38	9.5	0.79 (0.47, 1.33)
Number of existing allergies					.026^{^b}
0	333	25	7.5	Reference
1 or 2	268	39	14.6	2.13 (1.23, 3.70)	.007^{^c}
>2 allergies	70	7	10	1.35 (0.58, 3.17)	.49
Ferumoxytol dose					.40^{^b}
≤2 mg/kg	121	8	6.6	Reference
2–4 mg/kg	303	34	11.2	1.77 (0.69, 4.54)	.23
>4 mg/kg	247	29	11.7	1.86 (0.75, 4.58)	.18
Steroid use
None	461	44	9.5	Reference	.13
On decadron	183	25	13.7	1.56 (0.92, 2.67)
Pathology
Non-tumor	54	5	9.3	Reference	.71
Tumor	617	66	10.7	1.20 (0.47, 3.04)

↵a P values are obtained from the logistic generalized estimating equation model.
↵b Overall P value for the number of existing allergies or ferumoxytol dose.
↵c Statistically significant.