Background: Prolonged length of stay (LOS) is
associated with increased resource utilization and worse outcomes. The goal
of this study is identifying patient, surgical and systemic factors
associated with prolonged LOS overall and per diagnostic category for adults
admitted to a quaternary spinal care center. Methods:
We performed a retrospective analysis on 13,493 admissions from 2006 to
2019. Factors analyzed included patient age, sex, emergency vs elective
admission, diagnostic category (degenerative, deformity, oncology, trauma),
presence of neurological deficits in trauma patients, ASIA score, operative
management and duration, blood loss, and adverse events (AEs). Univariate
and multivariate analyses determined factors associated with prolonged LOS.
Results: Overall mean LOS (±SD) was 15.80
(±34.03) days. Through multivariate analyses, predictors of prolonged LOS
were advanced age (p<0.001), emergency admission (p<0.001), advanced
ASIA score (p<0.001), operative management (p=0.043), and presence of AEs
(p<0.001), including SSI (p=0.001), other infections (systemic and UTI)
(p<0.001), delirium (p=0.006), and pneumonia (p<0.001). The effects of
age, emergency admission, and AEs on LOS differed by diagnostic category.
Conclusions: Understanding patient and disease
factors that affect LOS provides opportunities for QI intervention and
allows for an informed preoperative discussion with patients. Future
interventions can be targeted to maximize patient outcomes, optimize care
quality, and decrease costs.