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Table 2 Hip angles in the MROpen and motion analysis lab, least-squares error in hip angles, and corresponding beta angles for squatting (for the participants considered in the final accuracy calculation)

From: Open MRI validation of a hip model driven with subject-specific motion capture data in predicting anterior femoroacetabular clearance

Participant #

Flexa, MoLabb

(°)

Flex, MROpen

(°)

IRc, MoLab

(°)

IR, MROpen

(°)

Abdd, MoLab

(°)

Abd, MROpen

(°)

LSQEe

(°)

Beta MoLab

(°)

Beta MROpen

(°)

Absolute Difference

in Beta

(°)

BMI (kg/m2)

Control (1)

64.4

64.2

−2.3

−0.7

5.5

5.9

1.6

9.2

9.4

0.2

25.0

CPM+ (1)

69.5

68.0

14.4

17.5

5.7

6.0

3.5

−31.6

−29.6

2.0

27.5

CPM+ (2)

84.9

87.9

5.4

2.4

4.5

3.2

4.4

−1.4

−2.1

0.7

21.5

CPM-(1)

76.1

79.4

23.0

20.0

2.9

1.7

4.6

3.0

2.3

0.7

26.1

CPM-(2)

78.4

77.9

−8.2

−1.8

10.0

11.3

6.5

5.6

5.9

0.3

28.5

CPM-(3)

84.5

81.2

8.9

17.6

5.0

5.6

9.3

−4.9

−6.7

1.8

23.2

Control (2)

66.7

74.7

−0.7

−4.2

5.6

2.2

9.4

21.4

20.2

1.2

25.8

CPM+ (3)

63.7

64.7

−3.7

−7.6

−4.5

4.9

10.2

−17.1

−17.3

0.1

32.6

CPM-(4)

76.3

81.1

−3.7

6.2

5.7

8.9

11.5

22.6

21.5

1.1

32.8

CPM-(5)

95.4

101.6

16.2

4.2

7.4

6.5

13.6

−6.8

−9.4

2.6

25.0

  1. aFlex Flexion, positive values represent flexion, and negative values represent extension; bMoLab Motion lab; cIR Internal rotation, positive values represent internal rotation, and negative values represent external rotation; dAbd Abduction, positive values represent abduction, and negative values represent adduction; eLSQE Least-squares error