Table 2.

Result of a multivariate logistic regression model evaluating HHV-6 as a predictor of delirium while controlling for covariates

Variable	OR (95% CI)	P
HHV-6 window*	2.5 (1.2-5.3)	.02
Age > 30 y	3.9 (1.6-9.4)	.003
HSV seropositive before transplantation	2.8 (0.9-8.9)	.08
Medical comorbidity (reference: low)
Moderate	1.4 (0.5-4.2)	.57
High	3.0 (1.1-7.8)	.03
More advanced underlying disease	2.3 (1.0-4.9)	.04
Conditioning regimen (reference: nonmyeloablative)
Myeloablative	5.9 (2.0-17.3)	.001
Reduced intensity	4.1 (0.7-22.7)	.11
Receipt of acute opioid	4.2 (2.1-8.4)	< .001
Moderate or severe pain (reference: none or mild)	1.7 (0.9-3.1)	.12

OR indicates odds ratio; and CI, confidence interval.

^*Any level of HHV-6 detected up to 2 weeks before or 2 days after first positive delirium assessment within a delirium episode. The interaction term acute HHV-6 underlying disease, P = .10.