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Table 2 Echo-types values of harvested and unharvested tendons for the two acquisition days, done by one examiner

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

Intra-rater reliability for acquisition and analysis – 1 examiner / 2 acquisitions/ 2 different days/ 2 analysis per patellar tendon
Examiner C.S.P. DAY 1 DAY 2    
Area/ Echo-types 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 10 participants (n = 10)
 Patellar Apex 56.0 ± 10.8 33.5 ± 5.9 7.3 ± 4.8 2.9 ± 1.6 54.7 ± 9.8 31.6 ± 6.9 8.9 ± 4.2 4.8 ± 2.6 0.95 (0.89–0.97) 21.1 5.3
 Proximal tendon 60.0 ± 6.6 32.1 ± 5.1 5.8 ± 3.9 2.2 ± 1.5 60.5 ± 8.8 29.4 ± 6.3 6.6 ± 4.1 3.6 ± 2.8 0.97 (0.94–0.98) 16.1 4.0
 Mid Tendon 62.8 ± 7.0 29.4 ± 4.0 5.4 ± 3.5 2.5 ± 1.7 64.8 ± 8.8 27.2 ± 6.8 5.2 ± 3.3 3.1 ± 2.6 0.98 (0.95–0.98) 15.1 3.8
 Distal Tendon 46.9 ± 7.9 35.3 ± 6.3 13.2 ± 8.4 4.5 ± 2.6 50.0 ± 12.6 34.0 ± 7.6 11.4 ± 5.8 4.6 ± 2.8 0.95 (0.89–0.97) 17.2 4.3
 Overall Tendon 53.6 ± 5.4 33.3 ± 4.1 9.5 ± 4.7 3.7 ± 1.7 54.9 ± 7.0 31.6 ± 4.5 9.2 ± 4.3 4.1 ± 2.4 0.99 (0.97–0.99) 9.0 2.2
Unharvested patellar tendons of 14 participants (n = 20)
 Patellar Apex 57.5 ± 12.3 39.0 ± 10.6 2.5 ± 5.2 0.9 ± 1.9 56.1 ± 13.3 40.5 ± 12.0 2.6 ± 4.7 0.8 ± 1.6 0.94 (0.90–0.96) 25.5 6.4
 Proximal tendon 65.7 ± 10.3 33.0 ± 8.6 0.8 ± 2.3 0.3 ± 0.9 67.4 ± 8.5 31.9 ± 8.0 0.5 ± 0.9 0.2 ± 0.4 0.97 (0.94–0.97) 21.0 5.2
 Mid Tendon 68.6 ± 10.2 30.1 ± 8.7 0.9 ± 1.9 0.3 ± 0.7 70.2 ± 9.3 29.0 ± 8.6 0.4 ± 1.2 0.2 ± 0.5 0.98 (0.97–0.98) 14.6 3.7
 Distal Tendon 53.3 ± 10.1 41.3 ± 7.8 4.3 ± 5.6 1.2 ± 2.0 52.9 ± 17.7 42.2 ± 12.9 4.1 ± 9.3 0.7 ± 1.7 0.89 (0.83–0.92) 31.6 7.9
 Overall Tendon 60.4 ± 7.8 35.2 ± 6.3 3.2 ± 3.3 0.8 ± 1.2 61.6 ± 9.8 33.9 ± 6.9 3.6 ± 4.3 0.8 ± 1.2 0.98 (0.96–0.98) 15.1 3.8
  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