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Table 2 Entheseal thickness by age

From: Grey-scale ultrasound findings of lower extremity entheses in healthy children

Age (years)

N

PPL

DPL

AT

 

Mean ± SD (range) (mm)

25,50,75 th %ile

Mean ± SD (range) (mm)

25,50,75 th %ile

Mean ± SD (range) (mm)

25,50,75 th %ile

5-6

22

3.4 ± 0.5 (2.5-4.4)

3.1, 3.5, 3.8

2.8 ± 0.6 (1.8-4.1)

2.4, 2.8, 3.3

3 ± 0.5 (2-4.3)

2.7, 2.9, 3.3

7-8

27

3.2 ± 0.7 (2.2-4.8)

2.8, 3.1, 3.6

2.9 ± 0.5 (1.9-4.2)

2.5, 2.8, 3.1

3.1 ± 0.5 (2.2-4.2)

2.8, 3.2, 3.4

9-10

22

4.1 ± 0.8 (3-6.5)

3.5, 3.8, 4.6

3.6 ± 0.6 (2.5-4.9)

3.2, 3.6, 4

3.7 ± 0.6 (2.6-4.8)

3.4, 3.8, 4.1

11-12

12

4.7 ± 1 (3.1-7.3)

4.3, 4.6, 5

4 ± 0.8 (2.9-6.7)

3.5, 3.8, 4.2

4.2 ± 1.1 (2.7-6.6)

3.4, 4.1, 5

13-14

20

4 ± 0.7 (2.5-5.5)

3.3, 4.1, 4.6

3.8 ± 0.8 (2.7-6.3)

3.3, 3.7, 4.4

4 ± 0.7 (2.4-5)

3.4, 4.1, 4.6

15-16

7

4.3 ± 0.5 (3.6-5.1)

3.9, 4.2, 4.7

3.7 ± 0.5 (2.6-4.6)

3.4, 3.8, 4.1

4 ± 0.7 (3-5.2)

3.4, 4, 4.7

17-18

7

3.9 ± 0.6 (2.5-4.5)

3.7, 4, 4.4

3.5 ± 0.4 (2.8-4.2)

3.1, 3.6, 3.9

3.4 ± 0.4 (2.9-4.1)

3.1, 3.4, 3.8

  1. This table shows entheseal thickness stratified by two-year age groups. The mean with standard deviations and interquartile ranges are reported. The minimum and maximum thickness (min-max) in each age group is also reported.
  2. PPL = proximal patellar ligament insertion thickness, DPL = distal patellar ligament insertion thickness AT = Achilles tendon insertion thickness.