Spatiotemporal gait parameters influencing functional mobility of people with lower limb amputation.

BACKGROUND

Walking speed is a measure of functional mobility that is relatively easy to quantify. In people with lower limb amputation, reduced walking speed has been linked with specific atypical spatiotemporal gait parameters. However, the influence of atypical spatiotemporal gait parameters on the walking speed of people with unilateral transtibial amputation (TTA) and transfemoral amputation (TFA) remains unclear.

OBJECTIVES

To identify spatiotemporal gait parameters influencing walking speed of people with unilateral TTA or TFA.

STUDY DESIGN

Cross-sectional.

METHODS

The 10-meter walk test (10mWT) was used to measure walking speed, and an instrumented walkway was used to record spatiotemporal gait parameters. Regression analyses were used to determine the best subset of spatiotemporal gait parameters that influence the walking speed of people with TTA and TFA.

RESULTS

The study included 43 people with TTA and 49 with TFA. In the TTA group, spatiotemporal gait parameters accounted for 65.5% of the variance in walking speed, with prosthetic single limb support accounting for 52.2%, prosthetic terminal double limb support accounting for 8.9%, and stride width accounting for 4.4%. In the TFA group, intact swing accounted for 46.7% of the variance in walking speed. There was no significant difference in walking speed between the TTA and the TFA groups (p > 0.05).

CONCLUSIONS

The study's results highlight specific spatiotemporal gait parameters that affect the walking speed of people with unilateral TTA and TFA. In addition, results suggest that walking speed over short distances is not confounded by amputation level (i.e., TTA and TFA).