Table 2 Pearson's correlation coefficients between the frame subtraction score and the GRF parameter
From: Validity of the frame subtraction method in dynamic postural stability
DPSI | MLSI | APSI | VSI | |
|---|---|---|---|---|
Frontal plane | ||||
Maximum of the frame subtraction score | r = 0.747 P < 0.001 | r = 0.464 P = 0.039 | r = − 0.253 P = 0.282 | r = 0.609 P = 0.004 |
Sum of the frame subtraction score | r = 0.491 P= 0.028 | r = 0.622 P = 0.003 | r = − 0.069 P = 0.74 | r = 0.527 P = 0.017 |
RMS of the frame subtraction score | r = 0.717 P < 0.001 | r = 0.592 P = 0.006 | r = − 0.258 P = 0.272 | r= 0.642 P = 0.002 |
Sagittal plane | ||||
Maximum of the frame subtraction score | r = 0.432 P = 0.057 | r = − 0.020 P = 0.932 | r = − 0.365 P = 0.114 | r = 0.387 P = 0.092 |
Sum of the frame subtraction score | r = 0.306 P = 0.190 | r = 0.265 P = 0.259 | r = − 0.085 P = 0.722 | r = − 0.301 P = 0.196 |
RMS of the frame subtraction score | r= 0.466 P = 0.039 | r = 0.142 P = 0.551 | r = − 0.278 P = 0.235 | r = 0.419 P = 0.066 |
Combined planes | ||||
Maximum of the frame subtraction score | r = 0.566 P= 0.009 | r = 0.106 P = 0.656 | r = − 0.374 P = 0.104 | r= 0.490 P = 0.028 |
Sum of the frame subtraction score | r = 0.405 P = 0.076 | r = 0.426 P = 0.061 | r = − 0.087 P = 0.716 | r = 0.416 P = 0.068 |
RMS of the frame subtraction score | r = 0.606 P = 0.005 | r = 0.305 P = 0.191 | r = − 0.303 P = 0.194 | r = 0.531 P = 0.016 |