Could mobilty performance measures be used to evaluate wheelchair skills?

Area of Science:

• Rehabilitation Science
• Biomechanics
• Clinical Assessment

Background:

• Wheelchair mobility is crucial for independence in individuals with spinal cord injury (SCI).
• Standardized assessment of wheelchair skills is essential for rehabilitation and outcome measurement.
• The Wheelchair Skill Test (WST) is a common measure, but its relationship with objective performance metrics needs further investigation.

Purpose of the Study:

• To examine the correlation between WST performance and objective mobility measures (Vmax, Vspont, Stime) in SCI.
• To assess the test-retest and inter-rater reliability of these mobility performance measures.

Main Methods:

• Forty SCI patients completed the WST and mobility tests: maximal velocity (Vmax), spontaneous velocity (Vspont), and a 10-m slalom (Stime).
• Test-retest reliability was evaluated in 18 patients, and inter-rater reliability in 8 patients.
• Spearman's correlation and intraclass correlation coefficients (ICC) were used for analysis.

Main Results:

• Significant, high correlations were found between WST scores and Vmax, Vspont, and Stime.
• Excellent test-retest reliability was observed for Vmax (ICC=0.94), Stime (ICC=0.88), and Vspont (ICC=0.84).
• Exceptional inter-rater reliability was demonstrated for Vmax (ICC=0.92), Vspont (ICC=0.92), and Stime (ICC=0.95).

Conclusions:

• Maximal velocity (Vmax) and slalom time (Stime) are reliable and valid measures for assessing wheelchair skills in SCI.
• These metrics show strong potential for developing new scales to evaluate wheelchair proficiency.
• Spontaneous velocity (Vspont) appears less suitable for comprehensive wheelchair skill assessment compared to Vmax and Stime.