Table 7.

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

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

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)