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Table 5 Impact of different hypothetical protocols (D-Study) for QUS measurements recorded in longitudinal view

From: Quantitative ultrasound imaging of Achilles tendon integrity in symptomatic and asymptomatic individuals: reliability and minimal detectable change

QUS measurements in longitudinal view

E = 1

V = 1

V = 2

I = 1

I = 2

I = 3

I = 1

I = 2

I = 3

Geometric

 Thickness

SYMPT

Φ

0.85

0.88

0.90

0.90

0.93

0.94

SEM

0.09

0.07

0.07

0.07

0.06

0.05

MDC90%NORM

29.21

25.17

23.66

23.28

19.35

17.84

ASYMPT

Φ

0.90

0.93

0.94

0.94

0.96

0.97

SEM

0.03

0.03

0.02

0.02

0.02

0.02

MDC90%NORM

14.52

11.80

10.74

10.94

8.76

7.90

Grayscale histogram

 Echogenicity

SYMPT

Φ

0.83

0.87

0.88

0.90

0.93

0.93

 

SEM

6.35

5.56

5.27

4.65

4.03

3.79

MDC90%NORM

18.68

16.36

15.51

13.69

11.84

11.16

ASYMPT

Φ

0.89

0.91

0.92

0.94

0.96

0.96

SEM

4.76

4.05

3.78

3.37

2.87

2.68

MDC90%NORM

13.31

11.32

10.57

9.43

8.01

7.48

 Variance

SYMPT

Φ

0.69

0.76

0.79

0.81

0.86

0.88

 

SEM

157.27

131.36

121.51

111.20

92.89

85.92

MDC90%NORM

56.03

46.80

43.29

39.62

33.09

30.61

ASYMPT

Φ

0.63

0.73

0.77

0.77

0.84

0.87

SEM

118.97

93.45

83.22

84.12

66.08

58.85

MDC90%NORM

45.85

36.01

32.07

32.42

25.47

22.68

 Skewness

SYMPT

Φ

0.42

0.59

0.69

0.58

0.74

0.81

SEM

0.29

0.21

0.17

0.21

0.15

0.12

MDC90%NORM

104.67

74.18

60.70

75.60

53.58

43.84

ASYMPT

Φ

0.43

0.57

0.64

0.55

0.69

0.75

SEM

0.24

0.18

0.15

0.18

0.14

0.12

MDC90%NORM

116.65

87.95

76.02

90.96

67.84

58.13

 Kurtosis

SYMPT

Φ

0.30

0.42

0.49

0.46

0.59

0.66

SEM

1.50

1.15

1.00

1.06

0.81

0.71

MDC90%NORM

83.94

64.13

55.99

59.44

45.40

39.63

ASYMPT

Φ

0.38

0.51

0.58

0.50

0.63

0.70

SEM

0.81

0.62

0.54

0.64

0.48

0.42

MDC90%NORM

51.31

39.27

34.34

40.69

30.67

26.51

 Entropy

SYMPT

Φ

0.70

0.75

0.77

0.82

0.85

0.87

SEM

0.17

0.15

0.14

0.12

0.10

0.10

MDC90%NORM

5.92

5.21

4.95

4.30

3.75

3.55

ASYMPT

Φ

0.65

0.74

0.77

0.78

0.85

0.87

SEM

0.13

0.11

0.10

0.09

0.08

0.07

MDC90%NORM

4.79

3.85

3.48

3.39

2.72

2.46

Co-occurrence matrix

 Contrast

SYMPT

Φ

0.63

0.72

0.75

0.74

0.82

0.84

SEM

0.08

0.07

0.06

0.06

0.05

0.05

MDC90%NORM

30.57

25.20

23.14

23.72

19.11

17.30

ASYMPT

Φ

0.66

0.76

0.80

0.79

0.87

0.89

SEM

0.08

0.06

0.05

0.06

0.04

0.04

MDC90%NORM

28.23

21.88

19.30

19.96

15.47

13.65

 Energy

SYMPT

Φ

0.60

0.68

0.71

0.75

0.80

0.83

SEM

0.03

0.03

0.02

0.02

0.02

0.02

MDC90%NORM

33.74

28.73

26.85

24.39

20.63

19.21

ASYMPT

Φ

0.64

0.74

0.78

0.78

0.85

0.88

SEM

0.03

0.02

0.02

0.02

0.02

0.02

MDC90%NORM

34.26

27.17

24.35

24.22

19.21

17.22

 Homogeneity

SYMPT

Φ

0.63

0.71

0.75

0.75

0.82

0.85

SEM

0.02

0.01

0.01

0.01

0.01

0.01

MDC90%NORM

4.72

3.85

3.52

3.54

2.85

2.58

ASYMPT

Φ

0.71

0.80

0.83

0.83

0.89

0.91

SEM

0.01

0.01

0.01

0.01

0.01

0.01

MDC90%NORM

4.45

3.50

3.12

3.15

2.48

2.21