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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.