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A Concordance Table to Convert FIM Basic Mobility and Self-Care Scale Scores to SCI-FI/AT Scores
Pengsheng Ni1, Kelly Spellman2, Ross Zafonte3
1Biostatistics & Epidemiology Data Analytics Center, Boston University School of Public Health, Boston, MA.
Archives of Physical Medicine and Rehabilitation
|August 3, 2021
Summary
Researchers developed a method to estimate Spinal Cord Injury Functional Index Assistive Technology (SCI-FI/AT) scores using the Functional Independence Measure (FIM). This allows for merging data to analyze spinal cord injury outcomes, though caution is advised for specific injury types.
Area of Science:
- Rehabilitation Medicine
- Biomedical Engineering
- Clinical Research
Background:
- Functional assessments are crucial for understanding outcomes in spinal cord injury (SCI) rehabilitation.
- The Functional Independence Measure (FIM) and the Spinal Cord Injury Functional Index Assistive Technology (SCI-FI/AT) are commonly used but distinct assessment tools.
- A method to link data from these assessments would enhance the analysis of SCI functional outcomes.
Purpose of the Study:
- To develop a method for estimating SCI-FI/AT scores using FIM motor item data.
- To create a concordance table for translating FIM scores to SCI-FI/AT scores.
- To assess the agreement between estimated and actual SCI-FI/AT scores.
Main Methods:
- Secondary data analysis of 1237 individuals with traumatic SCI from 14 Spinal Cord Injury Model Systems programs.
- Matching nine FIM motor items to SCI-FI/AT domains (basic mobility and self-care).
- Employing a kernel-based method to create a concordance table and estimating SCI-FI/AT scores.
Main Results:
- A concordance table was developed, linking FIM motor items to SCI-FI/AT domains.
- Pearson correlations (0.79) and moderate reliability (ICC=0.79) were found between actual and estimated SCI-FI/AT scores.
- No significant differences were found in the total sample, but greater discrepancies occurred for individuals with tetraplegia (AIS A, B, C).
Conclusions:
- A concordance table enables the estimation of SCI-FI/AT self-care and basic mobility scores from FIM motor items.
- This facilitates merging FIM and SCI-FI/AT data for group-level analysis of SCI functional outcomes.
- Caution is recommended when using the table for individuals with cervical-level injuries (AIS A, B, C) due to score differences.
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