Table 1 Variables of interest used in the reliability (REL) and validity (VAL) studies
REL | VAL | Name | Abbreviation | Calculated in Qinematic™ | Calculated in BTS-Elite | Unit |
|---|---|---|---|---|---|---|
Posture | ||||||
R | C + D | Posture -Head-Lateral deviation | P-HL | Position of the top of the head in relation to the line of gravity in the frontal plane | Position of head marker in relation to midpoint between foot markers on Z-axis | Cm |
R | C + D | Posture -Head-Frontal deviation | P-HF | Position of the top of the head in relation to the line of gravity in the sagittal plane | Position of head marker in relation to midpoint between shoulder (?) markers on X-axis | Cm |
R | D | Posture - Neck angle forward | P-NA | The Cervicothoracic Angle forward, is the angle between the spine line and the neck line. The spine line is from the mid-hip to the mid-shoulder and the neck line is from the mid-shoulder to the top of the head. A positive number indicate that the neck is positioned forward (anterior) in relation to the spine and a negative number indicate that the neck is positioned backwards (posterior) in relation to the spine | Not calculated | Deg |
R | C + D | Posture - Pelvic position | P-PP | Position of the mid-pelvic in relation to the line of gravity in the frontal plane | Position of midpoint of the markers on the trochanter marker in relation to midpoint between the foot markers on Z-axis | Cm |
R | D | Posture - Height loss | P-HS | Estimated loss of body height minus measured body height: | Not calculated | Cm |
R | C + D | Posture - Weight distribution | P-WB | Mean position of the Centre of mass in relation to the midpoint between ankle joints | Mean position of the CoP in relation to the midpoint between foot markers | %LEFT LEG |
BALANCE- double stance (DS) | ||||||
R | C + D | Posture - Sway area | DS-SA | Sway area was calculated with Convex Hull-equation | Sway area was calculated with Convex Hull-equation | cm2 |
R | C + D | Posture - Maximal Sway Velocity in anterior-posterior (AP) direction | DS-SVAP | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
R | C + D | Posture - Maximal Sway Velocity in medio-lateral (ML) direction | DS-SVL | Velocity of the sway in ML-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
BALANCE- Single stance LEFT (SSL) | ||||||
R | C + D | Balance -Sway area | SSL-SA | Sway area was calculated with Convex Hull-equation | Sway area was calculated with Convex Hull-equation | cm2 |
R | C + D | Balance - Maximal Sway Velocity in anterior-posterior (AP) direction | SSL-SVAP | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
R | C + D | Balance - Maximal Sway Velocity in medio-lateral (ML) direction | SSL-SVML | Velocity of the sway in ML-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
Balance- Single stance RIGHT (SSR) | ||||||
R | C + D | Balance -Sway area | SSR-SA | Sway area was calculated with Convex Hull-equation | Sway area was calculated with Convex Hull-equation | cm2 |
R | C + D | Balance - Maximal Sway Velocity in anterior-posterior (AP) direction | SSR-SVAP | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
R | C + D | Balance - Maximal Sway Velocity in medio-lateral (ML) direction | SSR-SVML | Velocity of the sway in ML-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) | Velocity of the sway in AP-direction was calculated by (\( v=\frac{\Delta s}{\Delta t} \)) and the 95:th percentile was used as a maximum value | cm/s |
Side-bending | ||||||
R | C + D | Fingertips Left - distance to floor/body height | SB-LF | Minimal distance of the left fingertip to floor divided by estimated height | Minimal distance to floor of marker on the left fingertip divided by self-reported height | %Body height |
R | C + D | Fingertips Right - distance to floor/body height | SB-RF | Minimal distance of the right fingertip to floor divided by estimated height | Minimal distance to floor of marker on the right fingertip divided by self-reported height | %Body height |
R | Weight distribution Left | SB-%BW | Maximal position of the CoM to the left in relation to the midpoint between ankle joints | Maximal position of the CoP to the left in relation to the midpoint between foot markers | % | |