| Baseline | Post-placebo | 95% CI p value | Baseline | Post-allopurinol | 95% CI p value | |
| FMD (%) | 4.2 ± 1.8 | 4.12 ± 1.8 | −1.12 to 1.08 p = 0.76 | 4.2 ± 1.7 | 5.44 ± 1.8 | 0.18 to 1.42 p<0.001 |
| GTN (%) | 14.1 ± 6.0 | 15.0 ± 6.0 | −1.9 to 0.12 p = 0.08 | 14.6 ± 5.8 | 14.2 ± 5.7 | −0.26 to 1.0 p = 0.23 |
| AIx (HR 75) (%) | 27.76 ± 5.93 | 27.63 ± 5.54 | −2.4 to 2.64 p = 1.0 | 27.32 ± 4.98 | 24.69 ± 4.55 | 0.41 to 4.84 p<0.001 |
AIx, augmentation index; FMD, flow-mediated dilatation; GTN, glyceryl trinitrate.