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OBJECTIVE: Investigate the association between rehabilitation length of stay (LOS) and motor FIM® (mFIM) between rehabilitation admission and discharge among patients with traumatic spinal cord injury (SCI).
SETTING: Seventeen SCI Model Systems (SCIMS) centers in the United States.
METHODS: A total of 3386 patients with traumatic SCI enrolled in the SCIMS Database from 2011 to 2018. The main outcome measure was the mean change in mFIM (12 items) between rehabilitation admission and discharge by twelve neurological categories (C1-C4 American Spinal Injury Association impairment scale (AIS) A-B, AIS C, AIS D, and C5-C8 AIS A-B, AIS C, AIS D, and T1-T10 AIS A-B, AIS C, AIS D, and T11-S3 AIS A-B, C, D). Linear regression models were applied to estimate changes across rehabilitation LOS groups (shortest LOS, quarter2, quarter3, and longest LOS) after adjusting for covariables for each neurological category.
RESULTS: The mean age of study patients was 44.5 years. Patients were predominantly men (78.5%), non-Hispanic white (64.8%), and had private insurance (57.1%). The median LOS was 42 days across the entire sample. Longer LOS was associated with a higher mFIM score compared to the shortest LOS among patients with C1-C4 AIS D; C5-C8 AIS D; T1-T10 AIS A-B; and T11-S3 AIS A-B, C, and D after adjusting for demographics and clinical characteristics.
CONCLUSION: Among patients with C1-C4 AIS D; C5-C8 AIS D; T1-T10 AIS A-B; and T11-S3 AIS A-B, C, and D injuries, those with longer rehabilitation stays tended to have more motor function improvement.
