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Table 4 Echo-types values in harvested and unharvested tendons – performed by two examiners, each examiner taking two acquisitions on the same day

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

Inter-rater reliability for acquisition and analysis - 2 acquisitions/ same day/ 2 examiners/ 2 analysis per patellar tendon
Harvested and Unharvested patellar tendons of 16 participants - (n = 21)
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) (%)
Patellar Apex 55.4 ± 13.2 31.0 ± 8.2 8.8 ± 8.5 4.8 ± 5.0 49.0 ± 12.6 36.3 ± 8.5 10.2 ± 10.5 4.5 ± 5.0 0.94 (0.90, − 0.96) 25.5 6.4
Proximal tendon 60.8 ± 15.4 27.0 ± 8.8 7.7 ± 8.4 4.6 ± 5.3 55.8 ± 16.4 30.5 ± 6.1 9.8 ± 12.4 4.0 ± 4.9 0.97 (0.94, − 0.97) 21.0 5.2
Mid Tendon 60.6 ± 17.5 26.4 ± 9.3 8.5 ± 10.1 4.5 ± 4.6 58.7 ± 14.1 29.2 ± 7.0 8.1 ± 9.0 4.0 ± 5.8 0.98 (0.97, − 0.98) 14.6 3.7
Distal Tendon 52.2 ± 16.6 26.2 ± 9.6 14.0 ± 10.3 7.4 ± 6.0 55.8 ± 16.5 28.1 ± 6.3 11.1 ± 12.1 5.2 ± 4.6 0.89 (0.83, − 0.92) 31.6 7.9
Overall Tendon 54.2 ± 15.6 25.4 ± 7.9 13.4 ± 9.6 7.1 ± 5.4 53.1 ± 13.9 29.2 ± 4.9 12.3 ± 9.4 5.6 ± 4.4 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