Categorical predictors of outcome from univariate analysis
| Cumulative probability of event after time zero (time in months) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Variable | Number of patients | Number of events | 6 | 12 | 24 | 36 | 48 | HR* | 95% CI | p Value† |
| *The Cox hazard ratio with the most favourable category as the reference value. | ||||||||||
| †Significance for comparison with the most favourable category of subgroup (log-rank statistic). | ||||||||||
| B/CoA, ratio between diameters of the balloon and the aorta at the level of the coarctation; B/Sub, ratio between diameters of the balloon and the aorta at the level of the left subclavian artery; Car/Sub, ratio between diameters of the balloon and the aorta at the level of the left carotid and left subclavian arteries; CI, confidence interval. | ||||||||||
| Total | 54 | 8 | 0.06 | 0.06 | 0.08 | 0.14 | 0.26 | |||
| Age (years) | ||||||||||
| ≤25 | 34 | 4 | 0.05 | 0.05 | 0.05 | 0.24 | 0.19 | 1 | (reference) | |
| >25 | 20 | 4 | 0.06 | 0.06 | 0.06 | 0.06 | 0.43 | 2.27 | 0.54 to 9.54 | 0.2637 |
| Stent | ||||||||||
| No | 32 | 7 | 0.06 | 0.06 | 0.09 | 0.16 | 0.27 | 2.15 | 0.24 to 19.6 | 0.4970 |
| Yes | 22 | 1 | 0.05 | 0.05 | 0.05 | 0.05 | 1 | (reference) | ||
| Anatomy | ||||||||||
| Discrete | 41 | 4 | 0.05 | 0.05 | 0.08 | 0.08 | 0.13 | 1 | (reference) | |
| Hypoplasia | 9 | 1 | 0 | 0 | 0 | 0.22 | 0.22 | 1.24 | 0.14 to 11.11 | 0.8477 |
| Tubular | 4 | 3 | 0.25 | 0.25 | 0.25 | 0.63 | 1 | 10.77 | 2.38 to 48.70 | 0.002 |
| Car/Sub | ||||||||||
| ≤0.90 | 22 | 5 | 0.14 | 0.14 | 0.14 | 0.24 | 0.46 | 3.57 | 0.84 to 15.17 | 0.0576 |
| >0.90 | 32 | 3 | 0 | 0 | 0.03 | 0.07 | 0.13 | 1 | (reference) | |
| B/Sub | ||||||||||
| ≤1.3 | 46 | 5 | 0.04 | 0.04 | 0.07 | 0.1 | 0.14 | 1 | (reference) | |
| >1.3 | 8 | 3 | 0.11 | 0.11 | 0.11 | 0.45 | 1 | 5.38 | 1.23 to 23.47 | 0.0125 |
| B/CoA | ||||||||||
| ≤4 | 28 | 3 | 0.07 | 0.07 | 0.11 | 0.11 | 0.11 | 1 | (reference) | |
| >4 | 26 | 5 | 0.04 | 0.04 | 0.04 | 0.16 | 0.39 | 1.89 | 0.45 to 7.90 | 0.3743 |
| Predilatation gradient (mm Hg) | ||||||||||
| ≤50 | 19 | 3 | 0.048 | 0.048 | 0.11 | 0.11 | 0.21 | 1 | (reference) | |
| >50 | 35 | 5 | 0.06 | 0.06 | 0.06 | 0.15 | 0.26 | 0.95 | 0.22 to 3.96 | 0.9399 |
| Postdilatation gradient (mm Hg) | ||||||||||
| ≤10 | 44 | 2 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 1 | (reference) | |
| >10 | 10 | 6 | 0.08 | 0.08 | 0.17 | 0.35 | 0.60 | 9.59 | 1.92 to 47.80 | 0.0058 |