Skip to main content

Table 6 Echo-type values in harvested and unharvested tendons – one acquisition made by one examiner with two examiners analyzing (the same scan data)

From: Reliability and methodology of quantitative assessment of harvested and unharvested patellar tendons of ACL injured athletes using ultrasound tissue characterization

Inter-rater reliability of analysis - 1 acquisition/ 1 day/ 2 examiners/ 2 analysis per patellar tendon

Area/ Echo-types

Examiner 1 (C.S.P.)

Examiner 2 (R.C.G.S.)

   

Type I (%)

Type II (%)

Type III (%)

Type IV (%)

Type I (%)

Type II (%)

Type III (%)

Type IV (%)

ICC (95% CI)

SEM (ICC) % GrM (%)

SEM (ICC) (%)

Harvested patellar tendons of 17 participants (n = 20)

 Patellar Apex

52.8 ± 10.0

31.3 ± 6.3

10.4 ± 5.9

5.4 ± 3.5

52.0 ± 10.0

32.3 ± 6.9

10.5 ± 5.8

5.3 ± 3.0

0.98 (0.97, − 0.98)

10.5

2.6

 Proximal tendon

57.4 ± 8.8

29.4 ± 4.8

8.7 ± 5.8

4.7 ± 4.0

57.3 ± 7.9

29.3 ± 5.0

8.6 ± 4.8

4.8 ± 3.2

0.99 (0.97, − 0.99)

10.4

2.6

 Mid Tendon

58.5 ± 10.1

28.1 ± 4.8

8.8 ± 6.2

5.0 ± 3.9

58.5 ± 10.8

29.0 ± 7.3

7.8 ± 6.8

4.9 ± 4.7

0.98 (0.97, − 0.98)

11.3

2.8

 Distal Tendon

47.1 ± 8.7

29.3 ± 8.6

15.7 ± 8.0

7.9 ± 5.2

48.8 ± 11.1

30.5 ± 9.1

13.8 ± 7.7

7.1 ± 5.1

0.95 (0.92, − 0.96)

15.2

3.8

 Overall Tendon

50.7 ± 7.3

28.7 ± 5.8

13.7 ± 6.6

7.1 ± 4.5

51.2 ± 6.0

29.9 ± 5.5

12.6 ± 5.6

6.6 ± 4.0

0.99 (0.98, − 0.99)

6.8

1.7

Unharvested patella tendons of 15 participants (n = 19)

 Patellar Apex

62.2 ± 6.7

36.6 ± 6.2

0.8 ± 1.2

0.3 ± 0.5

60.9 ± 11.3

37.3 ± 10.4

1.4 ± 2.1

0.4 ± 1.0

0.97 (0.94–0.97)

19.1

4.8

 Proximal tendon

70.2 ± 5.6

29.0 ± 5.5

0.4 ± 0.8

0.2 ± 0.4

68.3 ± 6.9

30.3 ± 6.3

0.9 ± 1.3

0.3 ± 0.5

0.99 (0.98–0.99)

12.8

3.2

 Mid Tendon

72.6 ± 6.3

26.5 ± 6.6

0.5 ± 0.8

0.2 ± 0.5

70.7 ± 5.5

27.4 ± 5.2

1.0 ± 1.7

0.6 ± 1.2

0.99 (0.97–0.99)

13.7

3.4

 Distal Tendon

58.3 ± 10.9

36.8 ± 9.4

3.7 ± 3.9

1.3 ± 1.5

57.9 ± 10.0

37.6 ± 6.7

3.3 ± 4.7

1.2 ± 1.9

0.95 (0.91–0.96)

23.0

5.8

 Overall Tendon

64.3 ± 5.4

31.4 ± 5.4

2.9 ± 2.4

1.1 ± 1.2

63.3 ± 4.4

33.0 ± 4.1

2.8 ± 2.5

1.1 ± 1.1

0.99 (0.98–0.99)

9.4

2.3

  1. n = number of tendons assessed. Mean ± standard deviation
  2. ICC (95% CI) Intra-class coefficient of reliability (95% confidence interval), SEM % GrM Standard error of measurement as percentage of the grand mean, SEM Standard error of measurement