Comparison of index tests summary statistics between those with and without adverse outcome
| Characteristic | Adverse outcome | No adverse outcome | All |
| (n=30) | (n=787) | (n=817) | |
| Baseline oxygen saturation | |||
| N (%) | 30 (100.0) | 783 (99.5) | 813 (99.5) |
| Mean (SD) | 94.5 (3.5) | 97.1 (2.3) | 97.0 (2.4) |
| Median (IQR) | 95.0 (92.0–97.0) | 97.0 (96.0–99.0) | 97.0 (96.0–99.0) |
| Post-exertion oxygen saturation | |||
| N (%) | 30 (100.0) | 787 (100.0) | 817 (100.0) |
| Mean (SD) | 91.6 (5.3) | 95.2 (4.2) | 95.0 (4.3) |
| Median (IQR) | 92.0 (88.0–96.0) | 96.0 (93.0–98.0) | 96.0 (93.0–98.0) |
| Oxygen saturation difference, pre-exercise to post-exercise | |||
| N (%) | 30 (100.0) | 783 (99.5) | 813 (99.5) |
| Mean (SD) | −2.9 (5.3) | −1.9 (3.5) | −2.0 (3.5) |
| Median (IQR) | −3.0 (−6.0 to 0.0) | −1.0 (−3.0 to 0.0) | −1.0 (−3.0 to 0.0) |