Mean percentage of the separate four echo-types and tendon thickness are denoted for the symptomatic and asymptomatic tendons
| Symptomatic tendons (n=26) | Asymptomatic tendons (n=26) | |||||
|---|---|---|---|---|---|---|
| Echo-types | Mean | SD | Mean | SD | p Value | ICC |
| % I | 33.9 | 12.7 | 48.4 | 12.3 | <0.001 | 0.92 |
| % II | 17.6 | 4.9 | 28.3 | 7.4 | <0.001 | 0.92 |
| % III | 20.9 | 7.5 | 12.5 | 7.9 | <0.001 | 0.95 |
| % IV | 27.5 | 11.1 | 10.8 | 7.6 | <0.001 | 0.95 |
| % I + % II | 51.5 | 16.4 | 76.6 | 15.1 | <0.001 | 0.95 |
| % III + % IV | 48.4 | 16.4 | 23.4 | 15.1 | <0.001 | 0.95 |
| Tendon anterior–posterior diameter (mm) | 9.2 | 1.7 | 6.8 | 1.2 | <0.001 | 0.84 |
Echo-types I+II (structure-related) and II+IV (non-structure-related) are grouped. The p values for the difference between symptomatic and asymptomatic tendons and intraclass correlation coefficient (ICC) values for the two observers are also presented for the echo-types and mean tendon thickness. The difference in all measured ultrasonographic tissue characterisation parameters between symptomatic and asymptomatic tendons was statistically significant.