Table 5.
Gait parameter differences between people with and without HIV as measured by the respective systems
| Parameter | Mean difference | 95% CI | p-value | Mean difference | 95% CI | p-value |
|---|---|---|---|---|---|---|
| IMU | OMC | |||||
| Spatial parameters | ||||||
| Step length (cm) | 2.29 | − 2.92; 7.50 | 0.36 | 2.60 | − 1.9; 7.1 | 0.24 |
| Normalized step length | 0.05 | − 0.03; 0.13 | 0.19 | 0.10 | 0.0; 0.1 | 0.09 |
| Stride length (cm) | 5.31 | − 5.11; 15.73 | 0.29 | 5.62 | − 3.52; 14.76 | 0.21 |
| Normalized stride length | 0.11 | − 0.04; 0.26 | 0.15 | 0.11 | − 0.01; 0.24 | 0.08 |
| Temporal parameters | ||||||
| Cadence (steps/min) | 7.71 | − 2.11; 17.54 | 0.11 | 7.34 | − 2.41; 17.09 | 0.13 |
| Stance time (s) | − 0.06 | − 0.11; 0.00 | 0.04* | − 0.06 | − 0.11; 0.00 | 0.04* |
| Step time (s) | − 0.04 | − 0.09; 0.01 | 0.12 | − 0.04 | − 0.09; 0.01 | 0.11 |
| Single support time (s) | − 0.02 | − 0.06; 0.03 | 0.41 | − 0.02 | − 0.06; 0.02 | 0.37 |
| Double support time (s) | − 0.04 | − 0.07; − 0.01 | 0.01* | − 0.04 | − 0.06; − 0.02 | < 0.01* |
| Temporophasic parameters | ||||||
| Stance time (%GC) | − 1.41 | − 2.90; 0.09 | 0.06 | − 1.29 | − 2.13; − 0.45 | 0.01* |
| Single support time (%GC) | 0.99 | − 0.65; 2.62 | 0.22 | 1.06 | 0.20; 1.92 | 0.02* |
| Double support time (%GC) | − 2.39 | − 5.34; 0.56 | 0.10 | − 2.35 | − 3.97; − 0.73 | 0.01* |
| Temporospatial parameters | ||||||
| Gait speed (m/s) | 0.12 | − 0.02; 0.26 | 0.09 | 0.13 | 0.00; 0.27 | 0.06 |
| Normalized gait speed | 0.05 | 0.00; 0.10 | 0.06 | 0.05 | 0.00; 0.10 | 0.03* |
Asterisks indicate statistically significant differences between participant groups
%GC percentage of gait cycle, IMU inertial measurement units, OMC optical motion capture