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Table 7 Absolute error (mean ± STD) along each coordinate for each subject using the \({\text{NAP}}_{\upomega }^{\left( 1 \right)}\) algorithm

From: In vivo estimation of the shoulder joint center of rotation using magneto-inertial sensors: MRI-based accuracy and repeatability assessment

Coordinate Subject 1 Subject 2 Subject 3 Subject 4 Subject 5 Mean
x 7.8 ± 5º,* 15.0 ± 11º,* 8.0 ± 4º,* 3.2 ± 3º,* 9.5 ± 5º 8.7 ± 7
y 10.7 ± 8 22.4 ± 7 4.3 ± 3 15.3 ± 3 11.2 ± 4 12.8 ± 8
z 5.0 ± 3* 22.5 ± 10 4.2 ± 4 13.5 ± 4 5.8 ± 5* 10.3 ± 9
  1. A star and/or a circle in the x row indicate a statistically significant difference respectively from y and/or z directions, while in the z row a star indicates a statistically significant difference from y direction (p < 0.016, Student’s t test with Bonferroni’s correction)