Table 3.

Multivariate Analysis of Risk Factors for Time to First Use of Supplemental Oxygen During the 28 Days After Diagnosis of Syncytial Virus (RSV) Infection

Covariate	HR (95% CI)	P
Recipient age at transplantation, y
<21	1
21–60	4.87 (1.47–16.2)	.01
>60	5.74 (1.64–20.1)	.006
Steroid use at diagnosis
None	1
≤1 mg/kg/day	1.92 (1.05–3.52)	.035
>1 mg/kg/day	2.39 (1.02–5.61)	.045
LRTI as time-dependent covariate
No	1
Yes	7.63 (4.33–13.4)	<.001
RSV testing method
Non-PCR	1
PCR	1.47 (.71–3.05)	.303

Data are for 230 hematopoietic cell transplant recipients.

Abbreviations: CI, confidence interval; HR, hazard ratio; LRTI, lower respiratory tract infection; PCR, polymerase chain reaction.