Effects of Seated Postural Stability and Trunk and Upper Extremity Strength on Performance during Manual Wheelchair Propulsion Tests in Individuals with Spinal Cord Injury: An Exploratory Study

Table 4

Key predictors of the performance-based timed manual wheelchair tests.

Regression equation	Adjusted	Beta	value
Timed 20 m propulsion test (s)
Natural velocity =	⁢No attempt to generate a predictive model
Maximal velocity =	0.530
15.233+
−7.003 shoulder adductor-weakest side		−0.752	0.002
Timed slalom test (s) =	0.713
30.880+
−9.046 shoulder adductors- strongest side+		−0.480	0.043
−11.561 seated reaching test-forward		−0.463	0.048
6 min propulsion test (m) =	0.519
332.898+
4.492 handgrip-strongest side		0.749	0.002

Variable inflation factor = 1.9.