Mean changes in VISA-A from baseline to all follow-up time points
| VISA-A score improvement from baseline, mean (SD) | Week 6 | Week 12 | Week 24 |
| GTN group | 20.62 (15.23) | 31.81 (16.94) | 39.97 (18.35) |
| Placebo group | 17.62 (10.5) | 28.03 (15.47) | 32.97 (16.27) |
| Adjusted between-group mean differences (95% CI)* | −1.33 (−6.96 to 4.31) | −1.25 (−8.0 to 5.49) | −3.80 (−10.63 to 3.02) |
| Significance† | P=0.64 | P=0.71 | P=0.27 |
*Adjusted for baseline VISA-A scores.
†Statistically significant between-group at p<0.05.
GTN, glyceryl trinitrate; VISA-A, Victorian Institute of Sports Assessment-Achilles.