Table 1 Abbreviations and descriptions of the CoP parameters
From: Balance and prospective falls in patients with rheumatoid arthritis
Abbreviation | Variable | Description |
|---|---|---|
Path-related CoP parameters | ||
PLen | Path length of CoP | Total path length of the CoP during the measurement, in mm |
PLenX | Medio-lateral component of the path length of CoP | Total path length of the CoP in medio-lateral direction, in mm |
PLenY | Anterior–posterior component of the path length of CoP | Total path length of the CoP in anterior–posterior direction, in mm |
Area-related CoP parameters | ||
StdElA | Area of sway | Standard ellipse area including 90% of all CoP points during the measurement, in cm2 |
Speed-related CoP parameters | ||
VmeanCoP | Mean velocity of CoP | Mean speed of the movement of the CoP over the time of the test path length/ duration, in cm/s |
VmeanX | Mean velocity of ML | Average speed of CoP movement in medio-lateral direction, in mm/s |
VmeanY | Mean velocity of AP | Average speed of CoP movement in anterior–posterior direction, in mm/s |