Table 4.
Absolute reliability (measurement error) of kinematic angles measured by inertial measurement units
| Angle/ROM (degrees) | SNP | PLHIV | ||
|---|---|---|---|---|
| SEM | Upper 95% CL | SEM | Upper 95% CL | |
| Pelvis | ||||
| Pelvis tilt ROM | 0.7 | 0.8 | 0.8 | 1.0 |
| Peak pelvis anterior tilt | 1.1 | 1.3 | 1.2 | 1.4 |
| Pelvis obliquity ROM | 0.9 | 1.1 | 1.1 | 1.3 |
| Pelvis rotation ROM | 2.1 | 2.5 | 1.8 | 2.2 |
| Pelvis rotation, IC | 5.2 | 6.2 | 3.7 | 4.4 |
| Hip | ||||
| Hip flexion ROM | 2.4 | 2.9 | 2.1 | 2.5 |
| Hip flexion ROM, LR | 1.7 | 2.0 | 2.6 | 3.1 |
| Hip flexion ROM, PS to IS (H3) | 2.3 | 2.8 | 2.0 | 2.4 |
| Hip flexion, IC | 2.4 | 2.9 | 2.1 | 2.5 |
| Peak hip flexion, swing | 2.2 | 2.6 | 2.1 | 2.5 |
| Peak hip extension, stance | 1.8 | 2.2 | 2.4 | 2.9 |
| Hip abduction ROM, mid-stance | 2.6 | 3.1 | 2.0 | 2.4 |
| Hip adduction ROM, LR | 1.4 | 1.7 | 1.5 | 1.8 |
| Hip internal rotation ROM | 2.6 | 3.1 | 2.8 | 3.4 |
| Knee | ||||
| Knee flexion ROM | 1.4 | 1.7 | 2.2 | 2.6 |
| Knee flexion ROM, stance (K1) | 2.9 | 3.5 | 2.5 | 3.0 |
| Knee flexion ROM, stance to swing (K3) | 3.0 | 3.6 | 2.8 | 3.4 |
| Knee extension ROM, MSt to TSt (K2) | 1.9 | 2.3 | 2.4 | 2.9 |
| Knee flexion, IC | 3.0 | 3.6 | 3.2 | 3.8 |
| Peak knee flexion during stance, LR | 3.9 | 4.7 | 5.8 | 7.0 |
| Peak knee extension, stance | 2.9 | 3.5 | 3.1 | 3.7 |
| Peak knee flexion, swing | 2.0 | 2.4 | 2.9 | 3.5 |
| Ankle | ||||
| Ankle dorsiflexion ROM, stance (A1) | 2.0 | 2.4 | 1.9 | 2.3 |
| Ankle dorsiflexion ROM, swing | 2.9 | 3.5 | 3.3 | 4.0 |
| Ankle plantarflexion ROM, push off (A2) | 2.2 | 2.6 | 3.7 | 4.4 |
| Ankle dorsiflexion, IC | 2.0 | 2.4 | 2.1 | 2.5 |
| Ankle plantarflexion, TO | 5.2 | 6.2 | 4.4 | 5.3 |
| Peak ankle plantarflexion | 4.1 | 4.9 | 4.4 | 5.3 |
A1 corresponding to A1 power phase of ankle, A2 corresponding to A2 power phase of ankle, H3 corresponding to H3 power phase of hip, HR heel rise, IC initial contact, K1 corresponding to K1 power phase of knee, K2 corresponding to K2 power phase of knee, K3 corresponding to K3 power phase of knee, LR loading response, MSt mid-stance, PLHIV people living with HIV-1 infection, ROM range of motion, SEM standard error of measurement, SNP HIV-seronegative participants, TO toe-off, TSt terminal stance