Correlations between the VISA-A scores and UTC-typing at baseline, during follow-up after 26 weeks and with regard to the change scores
| VISA-A baseline | VISA-A follow-up | VISA-A difference | |
| Mid-portion baseline ET1+2 | ρ=0.166, sig. (two-tailed) 0.306 | ||
| Mid-portion follow-up ET1+2 | ρ=0.046, sig. (two-tailed) 0.778 | ||
| Mid-portion difference ET1+2 | ρ=−0.013, sig. (two-tailed) 0.935 | ||
| Mid-portion baseline ET3+4 | ρ=−0.173, sig. (two-tailed) 0.287 | ||
| Mid-portion follow-up ET3+4 | ρ=−0.048, sig. (two-tailed) 0.769 | ||
| Mid-portion difference ET3+4 | ρ=0.018, sig. (two-tailed) 0.912 | ||
| AoMD baseline ET1+2 | ρ=0.131, sig. (two-tailed) 0.422 | ||
| AoMD follow-up ET1+2 | ρ=0.150, sig. (two-tailed) 0.354 | ||
| AoMD difference ET1+2 | ρ=0.024, sig. (two-tailed) 0.882 | ||
| AoMD baseline ET3+4 | ρ=−0.126 sig. (two-tailed) 0.422 | ||
| AoMD follow-up ET3+4 | ρ=−0.137, sig. (two-tailed) 0.398 | ||
| AoMD difference ET3+4 | ρ=−0.024, sig. (two-tailed) 0.885 |
AoMD, area of maximum degeneration (one slide in the Achilles tendon mid-portion with the lowest representation of ET I); ET, echo-type; sig., significance; UTC, ultrasound tissue characterisation; VISA-A, Victorian Institute of Sports Assessment-Achilles questionnaire; ρ, Spearman’s rho.