Table 3.
Absolute and relative risk associated with high and low risk groups.
| Absolute risk % (99% Confidence Interval) | Relative risk (99% Confidence Interval) | ||
|---|---|---|---|
|
| |||
| Postoperative complication | Low risk groupa | High risk groupa | High vs low risk group |
| Acute kidney injury | 14.7% (14.1%, 15.2%) | 72.6% (71.8%, 73.4%) | 5.0 (4.8, 5.1) |
| Intensive care unit admission > 48 hours | 11.9% (11.5%, 12.4%) | 68.3% (67.5%, 69.2%) | 5.7 (5.5, 6.0) |
| Mechanical ventilation > 48 hours | 2.5% (2.3%, 2.7%) | 47.6% (46.5%, 48.8%) | 19.4 (17.8, 21.1) |
| Wound complications | 3.7% (3.5%, 4.0%) | 25.9% (25.1%, 26.7%) | 6.9 (6.4, 7.5) |
| Cardiovascular complications | 2.2% (2.0%, 2.3%) | 20.5% (19.7%, 21.3%) | 9.5 (8.6, 10.5) |
| Neurologic complications | 1.8% (1.7%, 2.0%) | 24.1% (23.2%, 25.1%) | 13.1 (11.8, 14.5) |
| Sepsis | 1.2% (1.0%, 1.3%) | 25.8% (24.6%, 26.9%) | 21.8 (19.3, 24.7) |
| Venous thromboembolism | 0.7% (0.6%, 0.9%) | 10.1% (9.4%, 10.8) | 13.5 (11.4, 15.9) |
| Mortality | Low risk groupb | High risk groupb | High vs low risk group |
|
| |||
| 1-month mortality | 0.4% (0.3%, 0.5%) | 52.6% (50.2%, 55.0%) | 133.3 (115.0, 154.7) |
| 3-months mortality | 0.7% (0.6%, 0.8%) | 60.6% (58.8%, 62.4%) | 86.2 (77.1, 96.5) |
| 6-months mortality | 1.2% (1.0%, 1.3%) | 67.3% (65.7%, 68.8%) | 58.3 (53.3, 63.7) |
| 12-months mortality | 1.7% (1.6%, 1.9%) | 78.8% (77.5%, 80.0%) | 45.1 (42.0, 48.5) |
| 24-months mortality | 2.1% (1.9%, 2.3%) | 69.9% (68.7%, 71.1%) | 32.7 (30.6, 35.1) |
a
Patients were classified as low risk if their prediction score was less than or equal to cutoff and high as otherwise where cutoff values were 0.35, 0.35, 0.13, 0.10, 0.07, 0.07, 0.06, and 0.03 for acute kidney injury, intensive care unit admission > 48 hours, mechanical ventilation > 48 hours, wound complications, cardiovascular complications, neurologic complications, sepsis, and venous thromboembolism, respectively.
b
Cutoff values were 0.12, 0.17, 0.20, 0.26, and 0.24 for 1, 3, 6, 12, and 24-month mortality, respectively.