Background:
As defined by Medicare (United States), post-acute rehabilitation services include care provided in inpatient rehabilitation units and facilities, skilled nursing facilities, long-term acute hospitals, and by home health services.
Methods:
We retrospectively evaluated the use of rehabilitation-based post-acute services among Medicare beneficiaries who were hospitalized for lumbar spinal fusion (ICD-9-CM procedure codes 81.04–81.08) in 2012–2014, examined the case-mix for those discharged to rehabilitation- and non-rehabilitation based services, and determined the association between these categories of discharge disposition and 30-day rehospitalization. The independent effect of rehabilitation-based discharge destination on 30-day readmissions was examined with a generalized linear mixed model, first adjusting for patient characteristics and then stratified by clusters that delineated more homogenous clinical profiles.
Results:
Among 261,558 Medicare beneficiaries with lumbar spinal fusion surgery, 50.8% were discharged to a rehabilitation-based post-acute services. Patients discharged to rehabilitation-based services were older and had more comorbidities, and had longer hospital lengths of stays. After adjusting for patient and hospital characteristics, patients discharged to rehabilitation-based post-acute care had increased odds of 30-day rehospitalization than those without discharge to other destinations (OR 1.36; 95%CI=1.31, 1.40). Analysis of patients by clinical profile clusters found similar results.
Conclusions:
Clinical profiles of Medicare beneficiaries who had lumbar spinal fusion surgery and were discharged to rehabilitation-based post-acute services included more comorbidities than those discharged to non-rehabilitation based settings. Controlling for these differences did not mediate the negative association between use of rehabilitation-based post-acute services and 30-day readmission.