Table 4.

Mortality, hospital LOS, and costs attributable to transfusion exposure among patients on PAMV

Variable	Adjusted estimate	95% confidence interval
Hospital mortality (adjusted odds ratio)	1.21	1.00 to 1.48
Hospital LOS (days)	6.33	5.12 to 7.62
Hospital costs ($)	$48,973	$45,582 to $52,478

Each estimate adjusted for the following confounding variables: age, sex, race, Charlson Comorbidity Index, baseline and nadir hemoglobin, hospital-acquired pneumonia, blood stream infection, gastrointestinal endoscopy, abdominal surgery, cardiac surgery (on and off bypass), and orthopedic surgery. Mortality outcomes were adjusted additionally for hospital LOS. Hospital LOS and cost outcomes were adjusted for mortality. LOS, length of stay; PAMV, prolonged acute mechanical ventilation.