Table 3 Mean ± sd of reference (OPTO) and estimated (MIMU) linear RoM of the ulnar styloid ([px, py, pz]).

From: Upper limb joint kinematics using wearable magnetic and inertial measurement units: an anatomical calibration procedure based on bony landmark identification

 

RoM [mm]

RMSD [mm] (% RoMOPTO)

R 2

a 1

a0 [m]

OPTO

MIMU

px

149 ± 36

160 ± 26

8 ± 10 (5.1%)

0.968 ± 0.107

0.925 ± 0.228

28 ± 79

py

56 ± 16

59 ± 23

15 ± 12 (26.5%)

0.139 ± 0.26

0.229 ± 0.649

−67 ± 93

pz

138 ± 42

146 ± 53

8 ± 5 (5.6%)

0.977 ± 0.087

1.036 ± 0.224

−1 ± 37

  1. Median ± IQR are reported for RMSD (also expressed as percentage of the reference RoM, RoMOPTO) and for the three coefficients obtained from the linear fit method R2 (coefficient of determination, i.e. waveform similarity), a1 (slope, i.e. amplitude) and a0 (intercept, i.e. offset) used for comparing pairs of reference and estimated linear trajectories.
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